Definition of «early birthday»

"Early birthday" refers to celebrating someone's birthday before their actual birth date.

My birthday isn't until the 20th, so it's the best early birthday present ever! (glistenfit.com)
Plus, it's my birthday month so it's the perfect excuse to buy early birthday gifts for myself! (aikocunanan.com)
These photos are from my sister's early birthday celebration. (hallwaysaremyrunways.com)
(see all sentences)