at all hours
US /æt ɔl ˈaʊərz/
UK /æt ɔl ˈaʊərz/

1.
随时, 全天候
at any time, especially at unusual or inconvenient times, day and night
:
•
He calls me at all hours, even in the middle of the night.
他随时给我打电话,甚至在半夜。
•
The store is open at all hours during the holiday season.
节假日期间,商店全天候营业。