U+1F55B · emoji since 2010
The clock face emojis are the round analog clocks that show every hour and half hour, from twelve o'clock all the way around. They mean time, schedules, deadlines, and the steady tick of the day.
People reach for them to set a vibe around time: counting down to an event, nudging someone who is running late, or marking the exact hour something happens. Pick the time you need below and copy it.