When does the exhibition open?

when Preposition

— At which time (sometimes a question) "When did you start learning English?" - "Three years ago." "When does the film start?" - "At seven o'clock." — At the time She phoned me when I was in the bath. It was the year 1996 when I met John. — After When I get up, I always drink a cup of coffee.

does Noun

— A female deer. We saw three does at the zoo.

the Determiner

— Used, instead of a, to reference something specific, already known to exist. Compare "I read a book." and "I read the book." — Used with a stress, to show that the word following is special. Are you the John Smith that I went to school with? — Used with an adjective that acts like a noun to mean all of the people concerned The poor are always with us. — Used with superlatives forms of adjectives and adverbs. You are the best.

exhibition Noun

— An exhibition is a public display of objects or products. There was an art exhibition on in the town hall. — An exhibition is a display or demonstration of a skill.

open Verb

— To move something to the side to allow entrance. I will open the door for our guests. — To prepare for business. She opened the store.

open Adjective

— Having a hole or opening, not closed. The door was open. — Available for business. The shop is open.