MAR10 Day (Mario Day) is an annual celebration of Nintendo’s mascot Mario, held every year on March 10 because the date “Mar 10” looks like “MAR10,” which resembles his name.

What is MAR10 Day?

  • It’s an unofficial-turned-official “holiday” for the Super Mario franchise, celebrated on March 10 each year.
  • The name comes from the way the date is written: “Mar 10” → “MAR10” → Mario.
  • Fans around the world use the day to show love for Mario games, characters, and the wider Nintendo universe.

Think of it like a mini “Mario festival” that pops up once a year across the internet, game stores, and fan communities.

How did MAR10 Day start?

  • It began as a fan-made idea: people online noticed the visual pun “MAR10” and started using hashtags like #MAR10Day and #MarioDay on social media.
  • Nintendo later leaned into it and officially recognized MAR10 Day, promoting it with events, posts, and special activities from around 2015–2016 onward.
  • Since then, it has grown each year, especially as Mario remains one of the best-known and best-selling video game characters globally.

What happens on MAR10 Day?

Typical things you’ll see on and around March 10:

  • Game sales & discounts:
    • Digital shops (like Nintendo eShop) often run deals on Mario titles such as Super Mario Odyssey , Mario Kart , and Super Mario Maker.
  • Special events & promos:
    • Giveaways, sweepstakes, or challenges hosted by Nintendo and retailers, sometimes with themed prizes or bundles.
  • Fan activities :
    • People replay classic Mario games, stream speedruns, or hold local tournaments.
    • Cosplay, fan art posts, and themed parties (red hats, overalls, mustaches, the works).

A simple example: a group of friends might marathon old NES and SNES Mario games in order, ending with a newer title like Super Mario Wonder , while sharing screenshots with a #MAR10Day tag.

Why does it matter / why is it trending?

  • Mario is one of the most recognizable characters in pop culture and holds records as a top-selling video game icon.
  • MAR10 Day gives Nintendo a yearly spotlight to promote new games, merch, and sometimes movie or cross-media tie-ins.
  • For the online crowd, it’s a fun, low-stakes excuse to revisit childhood nostalgia, debate favorite Mario games, and share memes and fan theories.

Quick SEO-style points

  • Main idea: What is MAR10 Day? → It’s Mario Day on March 10, created from the “MAR10” date pun, now widely celebrated by fans and Nintendo.
  • “Latest news” angle: Expect mentions of this year’s sales, digital events, and any new Mario-related announcements around March 10.
  • “Forum discussion” angle: People commonly talk about best Mario games, rankings of 2D vs 3D titles, and whether Nintendo’s current MAR10 deals are worth it.

TL;DR: MAR10 Day is Mario Day on March 10, born from the “MAR10” date pun, now a yearly mix of discounts, events, and fan celebrations around Nintendo’s iconic plumber.

Information gathered from public forums or data available on the internet and portrayed here.