Yom Kippur: Washing To Remove Tum'a

On Yom Kippur (as on Tish'a b'Av), if you must wash your hands to remove:
  • Tum'a: You may wash your hands only up to the knuckle that connects your fingers to the rest of your hand (thumb: second knuckle; fingers: third knuckle).
  • Dirt from your hand: You may wash wherever the dirt is on your hand.