Rosh Chodesh

/ rɔʃ ˈxɔdəʃ /

noun

1. See Jewish calendar
   Judaism the first day of a new month, coinciding usually with the new moon, and also the preceding day if the previous month has 30 days, observed as a minor festival See also Jewish calendar

Word History and Origins

Origin of Rosh Chodesh¹

from Hebrew, literally: the beginning of the new moon