Longman Dictionary of Contemporary English
opening time
noun
EXAMPLES FROM CORPUS
▪ Before long, lengthy queues began to form before opening time.
▪ On'y thing open about it was opening time.
▪ Stores all over Paris were mobbed Friday, with huge crowds massing outside stores even before opening time.
Usage examples of "opening time".
I mean, opening time at the pub won't be for another fifty million years!