When you wish someone a happy birthday you might use a variety of emoji, such as the cake with candles 🎂, slice of cake 🍰, balloon 🎈, and wrapped gift 🎁.

Happy birthday to Apple's iCal, ... July 17 doubles as World Emoji Day, an unofficial holiday that was chosen for that reason. Apple has, in the past, unveiled new emojis on the 17th.