If you’re not from the Midwest, you likely haven’t heard about how the Chicago River has been dyed green to celebrate St. Patricks Day every year, for the last 55 years.

To commemorate the 55th anniversary of the river being dyed green and St. Patrick’s Day, one YouTube’r recorded this awesome timelapse of the river changing colors.

Have a happy St. Patrick’s Day (if you haven’t already started celebrating) and be safe out there!

I’m a writer based out of East Village, Manhattan. I work from my condo and local coffee shops (and a few restaurants with menus that are more unhealthy than licking a subway railing), meeting friends who have boats or boat access, touring the zoo for the zoo to visit my ex-boyfriends, and forcing my political beliefs on others at social events (kidding, don’t be one of those people.