Happy Legalization Day, Canada!

Today marks the end of prohibition on adult-use cannabis in Canada. Recreational pot became legal in the country today, four months after the Senate and House of Commons passed C-45, which allows for growing, possession and sales of cannabis for recreational use.

Canada is only the second country in the world to have legalized recreational cannabis. Each province in Canada will have leeway to decide where cannabis can be bought, sold, and used. Legal guidelines will be available here.

Ahead of legalization, there have been concerns about supply. During the first year of legalization, cultivators will be limited to producing 210 tons of pot. Consumer demand is estimated at 610 tons.

“There will not be enough legal supply, especially during the first half of the year following legalization, primarily because of the slow rate of licensing producers,” according to a report from the C.D. Howe Institute. The likely outcome is a persistent black market — at least for a while.

Canadian officials are also expected to announce an amnesty program for people with past marijuana convictions today.

Read more about Canada’s first day of legal marijuana here