A yellow face with eyes closed and mouth letting out three, cartoon-styled Zzz’s overhead to indicate it's sound asleep. The Zzz’s appear blue or purple across most platforms. May also represent boredom (slang, snooze).
Generally used instead of 😪 Sleepy Face to convey sleep or sleepiness.
📅 Sleeping Face was approved as part of Unicode 6.1 in 2012
and added to Emoji 1.0 in 2015.