Waning 🌙 Crescent Moon emoji is quite realistic (especially in the version of Apple) picture of the last phase of the moon — the 8th in order. It belongs to a number of emoji representing moon phases, along with 🌖 Waning Gibbous Moon emoji and others. Quite rarely, it is used in its direct, astronomy-related meaning; much more often it appears in the context of 🌃 Night, sleeplessness, nightmares, and all things like that.
Examples of using
“My worst nightmares have come true 🌘”
“Staying awake at night can be depressing 🌘”
How to type