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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for It's celebrated on a day in May 10 letters:

MOTHERHOOD: It's celebrated on a day in May
UNIONS: May Day celebrants, perhaps
MOM: May day celebrant
LEI: ___ Day (May 1 celebration in Hawaii)
LEI: ___ Day (May 1st celebration in Hawaii)
NERD: One may celebrate Pi Day
LEI: ___ Day (Hawaiian holiday celebrated on May 1)