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Women: Time-Based Positive Commandments/Mitzvot: Obligations
In addition to prayer obligations (see Women: Minimal Prayer), women and girls 12 years old and up are required to keep these time-dependent positive commandments, among others:
  • Candle-lighting for Chanuka (see Chanuka: Candles: Who Should Light )
  • Candle-lighting for Shabbat, Jewish festivals, Rosh Hashana, and Yom Kippur.
  • Havdala (say or hear) after Shabbat, Jewish festivals, Rosh Hashana, and Yom Kippur.
  • Kiddush (say or hear) on the first night (or first two nights outside Eretz Yisrael) of every Jewish festival, and also the next morning.
  • Passover (all commandments, including eating matza at the Passover seder).
    Note Because she must eat matza, she must therefore say birkat ha'mazon afterward (so if a woman omits ya'ale v'yavo in birkat ha'mazon at the seder, she must repeat birkat ha'mazon!).
  • Megila on Purim.
  • Shabbat (For why women must keep time-dependent, positive commandments on Shabbat, see Introduction to Shabbat )
  • Shofar on Rosh Hashana.
    Note Jewish women universally accepted upon themselves to hear shofar on Rosh Hashana, but they only need to hear 30 blasts.
  • Hearing the reading of Parashat Zachor.
To Set Up a Lulav
To set up a lulav: hold with spine facing you, with three myrtle branches (hadassim) on the right and two willow branches (aravot) on the left.  It is customary to put the myrtle and willow branches into a holder made of palm leaves.
NOTE Before Sukkot begins, open any sealed plastic bags that contain the willow and myrtle branches, as you may not cut them open on the festival days (the first and second days outside of Eretz Yisrael).
Birkat Cohanim: Talit over Child's Head
It is a custom for fathers to cover their sons' heads with their talit while the priests/cohanim bless the congregation.
Reason So the boys do not to look at the Divine Presence (shechina) present at the priests'/cohanim's fingertips at that time.
Note The priests'/cohanim's hands should be covered by a talit anyway.
Note This custom applies to ANYTIME the priests/cohanim say birkat cohanim, whether on:
  • Jewish festivals (the only time the priests/cohanim say this blessing outside of Eretz Yisrael), or
  • Daily (as is done in Eretz Yisrael).
Introduction to Holidays/Jewish Festivals/Chagim/Yom Tov
Jewish Festivals are listed in the Torah and are of two types: 
  1. Three pilgrimage festivals (shalosh regalim):
  • Passover,
  • Shavuot, and
  • Sukkot (including Shimini Atzeret).
These festivals were celebrated in ancient times by "appearing before God"--by bringing offerings to the Tabernacle or Temple.
  1. High Holidays
  • The Jewish New Year (Rosh Hashana—“Yom Teru'ain the Torah), and the
  • Day of Atonement (Yom Kippur).
 
Duration
Jewish holidays that were originally one day are now observed as follows:
  • Rosh Hashana--2 days.
  • Yom Kippur--1 day.
  • Shavuot--1 day in Eretz Yisrael or 2 days elsewhere.
  • Passover has festival days at the beginning and end of the holiday and intermediary days of lesser holiness, which are called chol ha'moed. In Eretz Yisrael, Passover lasts for 7 days in total and the first and last days are festival days. Outside of Eretz Yisrael, Passover lasts 8 days and has two festival days at the beginning and two at the end.
  • Sukkot has festival days at the beginning and at the end and intermediary days of lesser holiness, which are called chol ha'moed. In Eretz Yisrael, Sukkot lasts for 8 days and the first and last days are festival days (the last day is Shimini Atzeret). Outside of Eretz Yisrael, Sukkot lasts for 9 days and the first two days and last days are festival days (the 8th day is Shimini Atzeret and the 9th day is Simchat Torah).

Character
Each holiday contributes its own character to Jewish life (Passover--the theme of freedom; Yom Kippur brings atonement, etc.). 

Celebrating
How to celebrate these holidays is detailed in our Oral Law and halacha books. Jewish festivals as practiced today are similar in holiness to Shabbat. As with Shabbat, the Jewish festival has candle lighting, kiddush at two meals, and havdala.   We eat our best food and wear our best clothing on Jewish festivals (we eat our next-best food and wear our next-best clothing on Shabbat!).
The main idea behind eating meals on Jewish festivals is joy (simcha), so you should drink wine and eat meat (only if you enjoy wine and meat).  There is no third meal on Jewish festivals since people used to eat two meals each day (adding a third meal on Shabbat was for enjoyment/oneg).
 
Melachot
Any activities or actions permitted on Shabbat are also permitted on the Jewish festivals. Actions that are forbidden on Shabbat are generally also forbidden on Jewish festivals, but there are some leniencies (only if the actions are needed for that festival day).
Examples
  • Lighting from an existing flame,
  • Cooking and baking for the Jewish festival day, and
  • Carrying outside the eruv (hotza'a--transferring objects between domains).
 
Grama
Grama (indirectly causing an action) is permitted on Jewish festivals (but not on Shabbat). For example, you may advance or delay a timer that will make a light go on or off in the future (the timer must already be plugged in and operating from before sunset of the festival day).
Note For an action to be considered indirect based on time, there must be at least 2.5 seconds after the first action is done before the resulting action begins to happen.

Psik Reisha Dla Neicha Lei
Psik reisha dla neicha lei is forbidden on Jewish festivals, just as it is on Shabbat.

D'oraita Restrictions
D'oraita restrictions apply world-wide to:
  • First and seventh days of Passover,
  • First and eighth days of Sukkot,
  • First day of Shavuot,
  • Yom Kippur,
  • First day of Rosh Hashana.
Note The same restrictions apply to all other Jewish festival days but are rabbinical.
 
Women
In general, women are not required to perform the positive, time-dependent commandments. Women and girls are not required to eat any Jewish festival meals except the Passover seder meal (but they are not allowed to fast on those days).
Jewish Festivals: Medicines: When To Take: D’Rabanan Festival Days
You make take medicines for any reason on d'rabanan Jewish festivals--even medicines not allowed on the first day of Jewish festivals--except:
  • Medicines that you smear on skin.
  • If the Jewish festival falls on Shabbat (which can only be second day of Shavuot).
    Note The d'rabanan Jewish festivals are the second day of Jewish festivals except Rosh Hashana (actually, the second day of Rosh Hashana IS d'rabanan but has the status of d'oraita), plus the last day of Passover and Sukkot outside of Eretz Yisrael.
Jewish Festivals: Evening Kiddush
To fulfill the two requirements for Jewish festival evening kiddush:
  1. Make Kiddush
    Say, or hear, the three Jewish festival evening kiddush blessings/segments:
    1. Borei pri ha'gafen (if on wine or grape juice—preferred option), OR
      Ha'motzi (on two challot if you have no wine or grape juice, since no chamar medina is allowed for Jewish festival evening kiddush; see Jewish Festivals: Kiddush: Challot for Kiddush) AND
    2. Asher bachar banu mi kol am.... mekadeish Yisrael v'hazmanim, AND
    3. She'hecheyanu on all Jewish festival nights, except the last two nights of Passover.  So say she'hecheyanu on:
      • Both nights of Rosh Hashana (in or outside of Eretz Yisrael),
      • First two nights of Passover (1 night in Eretz Yisrael),
      • Both nights of Shavuot (1 night in Eretz Yisrael),
      • First two nights of Sukkot (1 night in Eretz Yisrael), and
      • Nights of Shmini Atzeret and Simchat Torah (same day in Eretz Yisrael).
      Note There is never any requirement on an indvidual to drink kiddush wine (except at the Passover seder), but the kiddush wine must be drunk by one or more persons.
      Note A woman who had said she'hecheyanu when she lit the Jewish festival candles does NOT say she'hecheyanu again if she makes kiddush for herself, even when making kiddush at the Passover seder.
      Note There is no need to eat a new fruit after saying she'hecheyanu on the second night of  Shavuot, Passover, or Sukkot. This is not comparable to Rosh Hashana, since the second festival night was instituted due to uncertainty of the actual date of the holiday, while Rosh Hashana is considered to be one single, long day.
  2. Establish a halachic “meal” (kovei'a se'uda).
    For how to establish a halachic meal, see Introduction to Jewish Festival “Eating a Meal” Requirements.
Note For evening kiddush, the custom is to go straight to the meal without delay (with no mezonot or snacking first).  B'di'avad if you snacked, it is still OK.
Note At night on Jewish festivals (or Shabbat), you may not say kiddush at a place where you will not eat your evening meal (even if you will hear or say kiddush again at the place where you will eat the meal).
Introduction to Blessing the Children/Birkat HaBanim
The Blessing for the Children has two parts:
  1. Introduction
    For Boys: “Yesimcha Elohim k'Efraim v'chi'Menashe
    (May God make you like Ephraim and Menashe)

    For Girls: “Yesimeich Elohim k'Sara, Rivka, Rachel, v'Leah” 
    (May God make you like Sara, Rebecca, Rachel, and Leah)
    Note The formula asks God to make the boys like Ephraim and Menashe but to make the girls like Sarah, Rivka/Rebecca, Rachel, and Leah. We might think that Sara, Rivka/Rebecca, Rachel, and Leah should be paired with their husbands, Abraham, Isaac, and Jacob instead of with their grandchildren and great-grandchildren. Yet, while Isaac and Jacob had the advantage of growing up in religious homes and in Eretz Yisrael, all of the fore-mothers as well as Ephraim and Menashe lived righteous lives even though all grew up in bad environments outside of Eretz Yisrael.
  2. Priestly Blessing/Birkat Cohanim (Numbers/Bamidbar 6:24-26)
    This is the blessing that the priests (cohanim) use when blessing the Jewish people.  For words to the blessing, please click here and scroll down to "Birkat Cohanim": http://practicalhalacha.com/blessings#B.
Introduction to Rosh Chodesh
Rosh Chodesh, the beginning of the Jewish (lunar) month, is a minor holiday of one or two days, depending on whether the previous month was 29 or 30 days.  When the preceding month is 30 days long, the 30th day becomes the first day of Rosh Chodesh and the second day of Rosh Chodesh is the first day of the succeeding month.
Rosh Chodesh used to be officially declared in Jerusalem each month by the Sanhedrin, based on evidence from at least two witnesses who had seen the new moon in the western sky.  For the past 1700 years or so, the new moon (and the dates for the entire Jewish calendar) have been determined by a formula prescribed by Hillel HaNasi (then head of the Jewish community in Eretz Yisrael). 
Shacharit: Tachanun: When Not To Say
Tachanun is related to judgment. Tachanun is NOT said at times of din/judgment:
  • At night,
  • On Tish'a B'Av,
  • In a house of mourning, and
  • Yom Kippur.
Tachanun is also NOT said at times of simcha/happiness:
At mincha before (and certainly not on):
  • Shabbat,
  • Jewish festivals,
  • Rosh Hashana, and
  • Rosh Chodesh.
At any prayer service on:
  • Isru chag (the day after each of the Jewish festivals),
  • Entire month of Nisan.
           Reason   Nisan has more than 15 days that we omit tachanun, and once we omit it for most of the month, we don't say it at all.
  • All of Chanuka, Purim, Shushan Purim, Tu B'Shvat, Rosh Chodesh, and from Rosh Chodesh Sivan until the day after Shavuot.
  • Tishrei from shacharit before Yom Kippur until after Simchat Torah (Shmini Atzeret in Eretz Yisrael). Resume saying tachanun:
    • Second day of Cheshvan, or
    • Day after isru chag of Simchat Torah (this is the more prevalent custom among Ashkenazim). Each person should follow his or her family or community custom.
Any time these people are present in your minyan (or in any other minyan in the building) either before a circumcision or while still involved in the brit or meal:
  • Mohel,
  • Sandak, or
  • Father of a boy having his circumcision.
       Note This even applies to mincha if the brit will take place after mincha.
 
Any time a groom is present during the first week after marriage.
Introduction to Forbidden Mixtures/Kilayim
The limits of kilayim keep:
  • Individual creations true to themselves, in the way they were created by God, and
  • Different, or opposing, spiritual forces governing creation in their own places and within their own bounds.
In the holiness of the Tabernacle or Temple, where opposites were peaceably and constructively resolved, kilayim in the form of sha'atnez was not only permitted but formed the foundation of all main tapestries and two of the High Priest's garments.
Note The Shulchan Aruch lists over 120 halachot pertaining to kilayim in planting!
 
Kilayim-type laws apply today to:
  • Animals (not yoking an ox and donkey together; not interbreeding, say, a horse and a donkey to produce a mule),
  • Food (not eating milk with meat),
  • Clothing - not wearing a garment made of a mixture of linen and wool (sha'atnez), and
  • Plants (interplanting, interbreeding, and grafting different species).
    Note Vineyards in Eretz Yisrael may only be near fruit trees if:
    1. A wall divides fruit tree and vineyard, OR
    2. The vineyard is not a bona fide vineyard. A bona fide vineyard has at least 5 grapevines in at least two rows, with at least two vines in one row and three in the other. 
Calculating the End (of Slavery)
God told Avraham (Abraham) that his children would be living in “lands not their own” and would be enslaved for 400 years, Yet the Torah states that the Israelites were in Egypt for 210 years.  So we say God “calculated the end” (chisheiv et ha'keitz) of the enslavement: He started the counting from the birth of Avraham's son, Yitzchak (Isaac), until the Exodus (a total of 400 years), as follows:
 
Time from Birth of Avraham's Son to Going Down to Egypt
  • Yaakov (Jacob) was born when Yitzchak was 60 years old.
  • Yaakov told Par'o (Pharoah) (when he and the rest of his family entered Egypt) that he was 130 years old.
  • 60 + 130= 190 years before going down to Egypt
 
Time in Egypt
210 years in Egypt
 
Time from Birth of Avraham's Son to Exodus
  190 Before going down to Egypt
+ 210 In Egypt
= 400 years from Yitzchak's birth to the Exodus.
Note Yitzchak and Yaakov did not yet “own” Eretz Yisrael. Since the Israelites were not given Eretz Yisrael until after the Exodus, Avraham's offspring were living in “lands not their own” for 400 years.
When Hechsher NOT Needed
Processed Food without Hechsher: Is It Kosher?
 
If a processed food does not have supervision/hashgacha, here are some issues to consider:
  • Ingredients;
  • Utensils/processing equipment;
  • Bishul akum/“prestigious” foods that require Jewish involvement in the cooking;
  • Heating system (recirculated steam?);
  • Heter for milk without being supervised - which conditions and countries can be relied on;
  • Non-food ingredients (lubricants, preservatives, emulsifiers...);
  • Reliability of the producer;
  • Is the non-kosher ingredient batel/nullified?
    • ownership (Is the food's producer or owner Jewish?)
    • intended consumer (Is the food being produced specifically for Jews, or is it for the public and Jews are some of the customers)?
    • Was the non-kosher substance added intentionally?
    • Does the non-kosher substance have flavor?
    • Was the non-kosher substance added for flavor?
A hechsher/kosher supervision is not needed on:
  • Beer made in the US (and sometimes in other countries).
  • Nuts (dry roasted) without additives.
  • Olives--assumed to be kosher unless mixed with ingredients that may be non-kosher, such as:
    • Vinegar (sometimes made from grapes).
    • Non-kosher chemical preservatives (in commercially sold olives).
    Note In open markets in which olives are sold in bulk, you may eat olives after checking the ingredients.
  • Olive oil (extra virgin).
  • Pure fruit juice NOT made from concentrate (such as orange or pineapple juice) does not normally require a hechsher (except for grape juice, which always requires a hechsher!).
    Note Juices from concentrate might have kashrut problems due to the vats in which they are cooked or pasteurized. If you can verify how the juice was processed and that there are no kashrut problems, you may use the juice without a hechsher. There may also be problems with juice made from fruit or vegetables which were grown in Eretz Yisrael, due to orla, shmitta, teruma and maaser.
  • Scotch whiskey--even where it might have been aged in sherry casks.
    Reason Any sherry would be nullified as less than 1/6th. 
    Note Other types of whiskey may not be kosher because:
    • Glycerine may have been added;
    • The whiskey may have been owned by a Jew during Passover in a previous year; or
    • Milk, or alcohol derived from milk, might have been added.
  • Sugar (confectioner's) needs kosher supervision only for Passover. Regular sugar never needs kosher supervision (currently).
  • Unprocessed foods such as
    • Raw fruits and vegetables (but might need to be checked for insects), and
    • Water, but some unfiltered tap water might have tiny creatures in it which make the water non-kosher.
Note Several websites list additional foods that do not need supervision to be trusted as kosher.
 
Introduction to Jewish Festivals: Medicines
Jewish Festivals: Medicines: When To Take
Medicine generally may not be used on the d'oraita Jewish festival days.

Jewish Festivals: Medicine for Chronic Diseases
You may take medicine on Jewish festivals (whether d'oraita or d'rabanan) for:
  • Chronic diseases, such as Parkinson's disease, or
  • Any disease that affects your entire body.
Jewish Festivals: Medicine for Non-Chronic Diseases
You may take medicine on Jewish festivals for non-chronic illnesses, if skipping one day will prevent cure.  You may not take medicine for non-chronic illnesses if skipping a day will just delay your being cured (unless the disease affects your entire body--in which case, you may take the medicine).

Jewish Festivals: Medicines: When To Take: D'Oraita Festival Days
Here are the d'oraita Jewish festivals:
  • First day of Sukkot, Passover, and Shavuot
  • Seventh day of Passover
  • Shmini Atzeret (8th day of Sukkot)
  • Yom Kippur
  • Both days of Rosh Hashana (even though the second day is d'rabanan).
On these days, as well as on d'rabanan Jewish festivals, you:
  • MUST take medicine whenever there is any question of a life-threatening disease or condition.
  • MAY take medicine for a condition that affects the entire body (illness, weakness, etc.). Consult a rabbi if possible.
    ExceptionYou may not smear substances on skin UNLESS the illness is life-threatening, in which case even smearing is permitted.
  • MAY use some medicines if only part of your body is affected by a non-life-threatening disease--consult a rabbi.
Jewish Festivals: Medicines: When To Take: D'Rabanan Festival Days
You make take medicines for any reason on d'rabanan Jewish festivals--even medicines not allowed on the first day of Jewish festivals--except:
  • Medicines that you smear on skin.
  • If the Jewish festival falls on Shabbat (which can only be second day of Shavuot).
Note The d'rabanan Jewish festivals are the second day of Jewish festivals except Rosh Hashana (actually, the second day of Rosh Hashana IS d'rabanan but has the status of d'oraita), plus the last day of Passover and Simchat Torah outside of Eretz Yisrael.

Jewish Festivals: Squeezing, Dabbing, Smearing
As on Shabbat, you may squeeze a tube of cream on Jewish festivals, but you might not be able to use the cream on the Jewish festival for other reasons—consult a rabbi.
Note Smearing creams or ointments is permitted only in life-threatening situations. Otherwise, you may not smear cream on skin on a Jewish festival (or Shabbat) even using a shinu'i such as using the back of your hand or a toe.
Dabbing is permitted, but only when you are permitted to use medicine. 
Example
You may use cream on a Jewish festival (and Shabbat) by dabbing (you may ONLY dab--you may not SMEAR cream) for a bee sting if it will affect the entire body. You may not use cream for a mosquito bite, since it is only a local irritation.
Procedure for Separating Terumot and Ma'asrot
(from kashrus/kk-medi-terumos.htm">http://www.star-k.org/kashrus/kk-medi-terumos.htm, used with permission)

Post this document in a conspicuous place.
Note The coin you are using for the separation must be in front of you (for the ma'aser sheini).
  1. Break or cut off more than one hundredth of the food and set it aside (for teruma and terumat ma'aser).
  2. Say the following (either in Hebrew or English):



    Yoteir me'echad me'me'a she'yeish kahn harei hu teruma gedola be'tzad tzefono. Oto echad me'me'a she'yeish kahn ve'od tish'a chalakim k'moto be'tzad tzefono shel ha'peirot harei hu ma'aser rishon. Oto echad me'me'a she'asitiv ma'aser rishon asuy terumat ma'aser, uma'aser sheini b'dromo, u'mechulal hu ve'chumsho al peruta be'matbei'a sh'yichidita lechilul ma'aser sheini ve'revai. Ve'im tzarich ma'aser ani ye'hei ma'aser ani bi'dromo. Im hu revai ye'hei mechulal hu ve'chumsho al peruta be'matbei'a she'yichidita le'chilul ma'aser sheini ve'revai.

    (Im ma'aser minim harbei tzarich le'hosif) “kol min al mino.”


    Translation
    (If there is a food of one type that requires separation) Whatever is MORE than one hundredth of this food shall be teruma on the north side of the piece that I have set aside. The one hundredth that is left in the piece I have set aside plus nine other pieces the same size on the north side of the food shall be ma'aser rishon. That same one hundredth in the piece I set aside that I have made ma'aser shall be terumat ma'aser.
    Furthermore, I am proclaiming ma'aser sheini to be in effect on the south side of the food, and I am redeeming it and its fifth on a pruta (smallest amount of money recognized by the Torah for most purposes) of this coin which I have in front of me. If this food needs ma'aser ani, the ma'aser ani shall take effect on the south side of the food.
    If this food is subject to the laws of neta revai then it and its fifth shall be redeemed on a pruta of this coin that I have in front of me.

    If there is a food of more than one type, add each type of food for its type.
     
  3. Wrap the broken or cut-off piece in plastic and discard.
  4. The coin--dime or coin of greater value--must eventually be disposed of in such a manner that it will not be used.
  5. The food may now be eaten.
 
If you do not want to say the long version, you may say this shorter version, after having separated a piece larger than 1\% of the total food:
All separations and redemptions shall take effect as is specified in this Star-K document outlining the Procedure for Separating Terumot and Ma'asrot, Tithes and Redemptions, which I have in my possession.

Whether saying the long or short version, only a little over one hundredth of the food will not be permitted to eat; all the rest may be eaten. Even though the tithes constitute over one fifth of the food, one is permitted to eat most of the tithes oneself, even though he may not be a Cohen or a Levi. Under no circumstances will it suffice merely to break off a piece of the food and throw it away. The aforementioned instructions must be strictly followed. The laws of the tithes apply to everyone, including the Cohen and Levi.

IMPORTANT
You must say the blessing lehafrish trumot u'ma'asrot if you know the produce definitely needed to have teruma and ma'aser taken; it was definitely:
  • Grown on Jewish-owned land in halachic Eretz Yisrael and
  • Had not yet had teruma and ma'aser taken from it.
BUT you must not say the blessing if the produce might have:
  • Not been grown on Jewish-owned land in halachic Eretz Yisrael, OR
  • Already had teruma and ma'aser separated.
Note The State of Israel is not the same as halachic Eretz Yisrael (that area of Eretz Yisrael owned or conquered by Jews during the Second Temple period). 
Introduction to Food Nullification: Foods
Categories of Batel/Nullification
Categories of nullification of non-kosher ingredients:
  • Never batel.
  • Batel b'shishim when the non-kosher substance is less than 1/60th of the total volume of the food.
  • Batel barov when the non-kosher substance is less than 1/2 of the total volume of the food.
When Can a Non-Kosher Substance Be Nullified in a Mixture?
Whether a non-kosher substance can be nullified in a mixture depends on 3 factors:
  • Whether the owner is Jewish;
  • Whether the intended eaters are Jewish; and
  • Whether the non-kosher substance was added intentionally as non-kosher.
If the answers to all three cases is yes, the food is never batel.

Food “Nullified in 60 Parts”:
Accidentally Adding Non-Kosher to Kosher Food 
Batel ba'shishim, or “nullified in 60 (parts)” is food that remains kosher despite the accidental addition of 1/60th or less in volume of non-kosher or restricted food, since at this proportion the non-kosher food's taste becomes negligible.
Taste: If the non-kosher substance: 
  • Has no taste, it is batel barov.
  • Has a taste but the eater cannot taste it, it is batel b'shishim (1/60th).
In all cases, if a substance is added for flavor and can be tasted in the final food, it will never be batel, regardless of whether it was added intentionally (since you can taste it, by definition it was not nullified) and regardless of whether the food was owned by a Jew or not. There are some exceptions. Consult a knowledgeable rabbi.
Some foods do impart their flavor even if less than 1/60th of the total volume of the food and these do not ever become nullified based on the 1/60th rule. Otherwise,  the non-kosher food must be:
  • Less than 1/60 of the volume of the whole.
  • Mixed in and not lying on the surface.
  • Not intentionally added by a Jew.
  • Not listed in “Foods that Never Become Nullified” (below).
Min b'Mino
Substances are only batel when they are similar (“min b'mino”). The substances must be the same type, have the same taste, and have the same appearance (the eater cannot identify them as being different).
Note In such situations, it would be batel barov from Torah (d'oraita) but batel b'shishim (1/60th) by rabbinical order (d'rabanan).
Example A piece of non-kosher meat is mixed in with kosher meat of more than 60 times the volume of the non-kosher piece. The non-kosher meat is batel b'shishim.
Note As a practical matter, this can only apply to ground meat.
Counter Example Non-kosher chocolate syrup or a non-kosher flavored extract mixed into milk or other liquid or onto a solid would NOT be min b'mino even though both are liquids, since their appearances, flavors, and substance are different.

Too Thin To Make Non-Kosher
The thinnest layer of non-kosher fish oil, vegetable oil, soap, or any other very thin substance on food that does not make the food non-kosher is whatever amount cannot be detected by the five human senses.
Foods that Never Become Nullified 
Here are some foods that NEVER become nullified by being less than 1/60th of the main food:
  • Yayin Nesech
    Wine that has been offered to a pagan god or used for idolatrous purposes (yayin nesech) is forbidden in any amount!
  • Mixtures of Milk and Meat
    Mixtures of milk and meat are not ever batel if they were cooked together.
    ExceptionBatel in 1/60th if:
    • You cannot identify either substance AND
    • The mixture is liquid in liquid or solid mixed with solid.
Examples: Milk from a pig mixed with milk from a cow; ground kosher meat mixed in with ground non-kosher meat.
  • Chametz
Any chametz in any amount that became mixed with kosher-for-Passover food DURING Passover is not nullified in 60 parts (batel ba'shishim). 
Note Chametz may be nullified if:
  • Less than 1/60th of the volume of kosher-for-Passover food, AND
  • Mixed with the kosher-for-Passover food BEFORE the holiday began, AND
  • Liquid (solid chametz that got mixed up with kosher-for-Passover food is never nullified).
  • Jew Intentionally Adding Non-Kosher Item
If the non-kosher substance was added by anyone (Jew or non-Jew) unintentionally (he did not realize it was not kosher), the food is kosher/batel b'shishim (1/60th).
If a Jew intentionally adds a non-kosher ingredient to a food, that ingredient never becomes nullified, even if the ingredient is less than 1/60th of the total volume of food and even if the ingredient has no flavor. Note that there are exceptions when non-Jews do the action, especially when a non-Jew adds a non-kosher ingredient or adds stam yainam wine to other liquids.
  • Unflavored or Flavored Non-Kosher Ingredient
    Non-Jew Adds Unflavored Non-Kosher Ingredient
    Situation A non-Jew adds a non-kosher ingredient that has no flavor. 
    Status The non-kosher ingredient is nullified if less than 1/2 of the total (it does not need to be less than 1/60th--batel ba'shishim).

    Non-Jew Adds Flavored Non-Kosher Ingredient
    Situation A non-Jew adds a flavored non-kosher ingredient even if to impart flavor.
    Status The non-kosher ingredient is nullified in 60 parts (batel ba'shishim).
    Note If a Jew had told the non-Jew to add the ingredient, the mixture is non-kosher, just as if a Jew had added it. 
  • Stam Yeinam Added to Water
    Situation A non-Jew adds—to water--stam yeinam (uncooked/non-mevushal) wine that has been handled while open by anyone other than a shomer-Shabbat Jew.  
    Status As long as the wine is less than 1/7th of the final volume, the mixture is kosher
    Note For mixtures with liquids other than water, consult a rabbi
  • Essential Additives
Any additive that is essential to making a food (such as rennet for making cheese, or yeast for baking bread) is NEVER nullifiable.  
 
  • Food Bought by the Piece
An item that is always bought by the piece (davar she'beminyan) such that even one piece has importance—such as a mango—is never nullifiable.
Situation One mango grown in Eretz Yisrael during a shmita year got mixed in with many mangoes that were grown outside of Eretz Yisrael.
Status Batel ba'shishim does not apply and you must apply the laws of shmita to all of them. 
Note If kosher and non-kosher food items have become mixed up, it is sometimes permissible to eat from the batch of food if most of the items are kosher (batel ba'rov), but a rabbi must be consulted.
 
  • Important Food
Situation A food with which you could honor a guest (chaticha ha'reuya l'hitchabed), such as 1/4 of a non-kosher chicken or a serving of non-kosher chopped liver, was mixed up with kosher servings—even if more than 60 kosher servings.
Status None may be eaten.
 
 
  • Permissible in Future (Davar SheYesh Lo Matirin)
An item that would become permissible in the future (davar she'yesh lo matirin) cannot become nullified by being mixed in with currently permissible foods. 
Examples 
  • An egg laid on Shabbat will not be nullified by being mixed with eggs laid before Shabbat.
  • Matza made of chadash flour will not be nullified by being mixed with matza made from yashan flour.
 
  • Whole Insects
An entire insect (briya--whole creature) never becomes nullified even if mixed with other kosher food. 
Note An insect that is not whole MAY be nullified. 
Examples
  • Frozen or raw chopped or ground vegetables or spices may be considered kosher even without supervision.
    Reason We assume that any bugs in the food would have gotten partly chopped or disintegrated and therefore nullified.
  • If a recipe calls for chopping or grinding herbs or vegetables, you may do so without first checking them for bugs.
    Note However, if you know there are bugs, you may not chop the food for the purpose of making the bugs nullified:  You must still check for insects before cooking or eating the food and if you see any bugs, you must remove them.
Note You may not eat bugs even if they have been dead for more than 30 days (some people erroneously permit this).