What's this '420' thing on your timelines all about?

Whether or not you’re a marijuana enthusiast - and let us immediately remind you that it is a crime in Trinidad and Tobago to possess marijuana for the purpose of trafficking - you’re probably aware that today is an unofficial holiday for those who are.

April 20—4/20—is a day when pot smokers around the world come together to, well, smoke pot.

Others use the day to push for legalization, holding marches and rallies.

But why the code 420? There are a lot of theories as to why that particular number was chosen, but most of them are wrong.