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.
For Jews, Yom Kippur, the Day of Atonement, which falls 10 days after Rosh Hashanah, is the culmination of the entire High Holy Day drama. This day marks our final opportunity of the year to repent of our sins. It is the holiest day of the Jewish year or, as the Bible describes it, the âSabbath of Sabbathsâ.