18 December 2028
Start of month of Tevet on the Hebrew calendar. Tevet (טֵבֵת) is the 4th month of the civil Hebrew year and the 10th month of the biblical Hebrew year. It has 29 days and corresponds to December or January on the Gregorian calendar. רֹאשׁ חוֹדֶשׁ, transliterated Rosh Chodesh or Rosh Hodesh, is a minor holiday that occurs at the beginning of every month in the Hebrew calendar. It is marked by the birth of a new moon. Runs for 2 days, 18 December 2028 to 19 December 2028 (30 Kislev 5789 to 1 Tevet 5789).
Jewish Holidays calendar