Crossword clues for open day
Longman Dictionary of Contemporary English
open day
noun
EXAMPLES FROM CORPUS
▪ Members of the public took the opportunity to see for themselves in a unique open day.
▪ Opening success: More than 1000 people visited Middlesbrough botanic centre's open day.
Wiktionary
open day
n. A casual event where an institution is open for inspection by anyone interested.