24-hour clock
21:10
What Time Is 21:10?
21:10 in 24-hour time is 9:10 PM on a 12-hour clock.
12-hour clock
9:10 PM
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9:10 PM is a clock reading, not a countdown target. Use a how-long-until page to time it.
Countdown to this clock time: how long until 9:10 PM