The ⏰ meaning is Alarm Clock. The emoji is also known as alarm or clock. A typical alarm clock with two bells. Depending on the platform on which the alarm clock emoji is displayed, the color of the alarm clock changes and also the time which it displays. But how and when to use the ⏰ emoji in a text message? You wake up and realize that you have overslept – such a crap. You could write to your friend, “I’ll come to class later today because my ⏰ did not ring.” The emoji was added to Unicode 6.0 in 2010 and to Emoji 1.0 in 2015.