Never miss a birthday again!

Birthdays. We all have them. Some of us celebrate them loudly with cake, banners, and a suspicious amount of prosecco. Others would quite happily pretend the whole thing isn’t happening and just eat a biscuit in peace.

But have you ever stopped mid–slice of Victoria sponge and wondered why we celebrate birthdays at all? Who decided that adding fire to cake was a sensible idea? And at what point did singing Happy Birthday become a globally accepted act of mild social torture?

Pull up a chair (preferably near the cake), because birthdays have a surprisingly long, weird, and occasionally unhinged history. From ancient gods and evil spirits to medieval peasants who absolutely did not get a party, here’s the story of birthdays—plus plenty of fun facts you can casually drop at your next celebration.

If you’ve ever marked a K-pop idol’s birthday in your planner with more enthusiasm than your cousin’s wedding anniversary, this article is for you. Welcome to your ultimate 2026 K-Pop Idol Birthday Calendar — a glitter-dusted guide to celebrating your bias properly (i.e., passionately, creatively, and maybe with a sprinkle of delusion).

This masterlist gives you the big dates, the vibes, and celebration ideas to make each idol’s birthday feel like your personal holiday. Think of this as a year-long roadmap to joy, music, and occasional emotional chaos. So let’s dive into the world of K-pop birthday devotion.

Between school events, family dinners, and soccer practices, it’s easy for birthdays to sneak up on you. Printable birthday calendars are a mom’s secret weapon — cute, organized, and endlessly practical.