Friday was National World Emoji Day and Twitter users all over the globe decided to join in the celebration, becoming Twitter’s number one trending topic.

Twitter Explodes Over World Emoji Day

The textable emoticons were first created in Japan by Shigetaka Kurita in 1999. Since then emojis have largely developed to include a variety display of icons.

Even more updates are coming as 38 new emojis are expected to be added to Unicode 9.0 as early as June 2016.

The worldemoji website explained to users why World Emoji Day would be celebrated on July 17. “July 17 is famously displayed on the iOS Calendar Emoji, which makes it the perfect date for World Emoji Day. Even if you are using a system with a different calendar emoji, that shouldn’t stop you joining in the global celebration of emoji.”

Twitter users were asked to tweet 50 of their favorite emojis, so surf through the hashtag to check out these popular tweets :

Pepsi decided to join the fun and launched an entire marketing campaign around the celebration, including a release of their own 35-design custom keyboard and cans with happy little faces.

Pepsi also posted a short promo film to YouTube, which tells an endearing and universal story with images to show how emoji can exist outside of the digital space; and is calling on fans to suggest new emoji by tweeting their ideas at #PepsiMoji.