A viral TikTok suggests everyone has a “birthday LEGO set.”To find yours, search your birth month, day, and year (e.g., “MMDD LEGO set YYYY”).If your birthday doesn’t generate a set, there’s a workaround—search just your birth month and day.
From horoscopes to color seasons to Enneagrams, people love anything that feels tailor-made to them. There’s something especially satisfying about a recommendation that feels personal—like learning you’re a “summer” who looks best in cool tones.
That same appeal fueled BuzzFeed’s heyday, when quizzes could turn your pizza toppings or favorite Disney princess into an oddly specific personality read. Now, the internet is applying that same logic to LEGO—using your birthdate to find your “assigned” set. Here’s what to know about the trend and how to find your birthday LEGO set.
What is a birthday LEGO set?
LEGO began selling building sets around 1949, which means there are decades’ worth of kits—roughly 16,000. Recently, one TikTok user found a way to turn that massive catalog into a personalized game.
In a February 12, 2026, video, TikTok user @brickbrouwer showed how to convert your birthdate into a LEGO set number to find your “birthday set.” The video quickly took off, racking up millions of views and sparking a wave of people sharing their results in the comments.
How to find your birthday LEGO set
The process is simple, but not exactly foolproof:
Combine your birth month and day into one number (MMDD)Search that number alongside your birth year (e.g., “MMDD LEGO set YYYY”)
Because LEGO set numbers weren’t designed with this game in mind, results can be hit or miss. Some people won’t find a match at all—especially if they were born before 1949, when the company first began.
Even within a single year, set numbers don’t follow a clean sequence. For example, in 1978, sets jumped from #205 to #208 to #230, so finding a match often comes down to luck.
Still, that unpredictability is part of the appeal. If you can’t find a match using your full birthdate, try dropping the year and searching for a set that matches just your month and day (MMDD).
Funny birthday LEGO sets
In response to @brickbrouwer’s video, users have flooded the comments with their birthday LEGO sets. While some kits nod to fantastical places or nostalgic collections, others are unintentionally hilarious. Here are a few standouts:
April 14, 1966: Window Parts Pack — White
“Man, all I got were windows!”
LEGO Group
LEGO Window Parts Pack — White, Set 414 from 1966.
August 5, 1986: Extra Bricks — Grey
“Can’t wait to put together my Extra Bricks Grey.”
LEGO Group
LEGO Extra Bricks — Grey, Set 805 from 1986.
June 30, 2011: Brick Separator — Orange
“This is so depressing and hilarious at the same time 😂”
LEGO Group
LEGO Brick Separator — Orange, Set 630 from 2011.
The bottom line
At its core, a “birthday LEGO set” is a playful, nostalgic way to explore LEGO’s massive catalog. You might even recognize your match and feel tempted to track it down.
While older sets are no longer sold in stores, you can often find them on resale sites like eBay or Facebook Marketplace. At the very least, it’s one more personalized recommendation to add to your list.
Kate Franke (she/her) is an editorial assistant in the Hearst Lifestyle Group, covering for Woman’s Day and Good Housekeeping. She loves all things lifestyle, home, and market related. Kate has a BAJMC in Magazine Media and BA in Writing from Drake University. She is a proud ASME alum whose work has appeared in Food Network Magazine, The Pioneer Woman Magazine, Better Homes & Gardens, Modern Farmhouse Style, Beautiful Kitchens & Baths, and more. Next to writing, Kate’s two favorite things are chai lattes and pumpkin bread!