Passover mo., usually

APR

This month often starts with April Fools' Day and is named after Aphrodite in some traditions.

This clue refers to Passover, a Jewish holiday that typically falls in the Hebrew month of Nisan, which often aligns with March or April on the Gregorian calendar. The abbreviation "mo." stands for "month," and "usually" hints at the most common month—April. Since crossword answers are short, "APR" is the standard three-letter abbreviation for April.