The bank is open around the clock.
around the clock 日以继夜地，连续一整天
We study for the finals around the clock.
Time: Available 24 hours around the clock.
He studied around the clock for his English exam.
all day long 全天
Most diners serve breakfast meals all day long, not just in the morning.
Snacks and drinks will be available all day long so just help yourself when you're hungry.
Bring a snack, especially for long practices, competitions, or all-day events.