In general, nasal mucus is clear and thin, serving to filter air during inhalation. During times of infection, mucus can change color to yellow or green either as a result of trapped bacteria or due to the body's reaction to viral infection.
As such, there is to be no work done on this day. There are other restrictions, as well. Unless health dictates otherwise, Yom Kippur is observed by a 25-hour fast that begins prior to sunset on the evening before Yom Kippur and ends shortly after nightfall on the day of Yom Kippur. During this time, you are not allowed to consume any food or beverage, including water.
Fasting and atonement, solemnity and joy . . . Print page. Yom Kippur is the holiest day of the yearâthe day on which we are closest to Gâd and to the quintessence of our own souls. It is the Day of AtonementââFor on this day He will forgive you, to purify you, that you be cleansed from all your sins before Gâdâ (Leviticus 16:30).