The one-o'clock face from the same 24-piece analog clock set, used as generic 'time' filler rather than to mean literally 1:00 — captions like 'time flies' or scheduling posts reach for whichever clock face happens to be handy. Fun trivia: because there are 24 nearly-identical tiny clock icons, most users can't reliably tell them apart at a glance, making them functionally interchangeable in casual use.
Keywords: 1, 1:00, clock, o’clock, one, time