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

Crossword clues for It's commemorated in June 4 letters:

DDAY: June commemoration
DDAY: It's commemorated in June
FLAGDAY: June commemoration
SAINT: ___ Botolph, commemorated on June 17.
PRIDEMONTH: June observance commemorating the Stonewall Riots