An attendee smokes marijuana during the Devin the Dude performance on Saturday, April 18, 2015 at Civic Center Park in Denver, Colorado. The annual 420 Rally once again brought over a thousand smokers and music lovers to the park to celebrate the holiday. (Brent Lewis, Denver Post file)

Colorado 4/20 guide: What’s happening when

4/20, a.k.a. the stoner’s rite of spring may have passed, but events are occurring all weekend.

Here in Colorado, 4/20 has been a big deal since well before the state legalized adult-use cannabis three years ago. And given that this year’s 4/20 happens on a Thursday — two days after the federal income tax deadline and two days ahead of Earth Day — there should be all sorts of reasons to celebrate.

Trivia time: “420” reportedly became slang for cannabis-related activities decades ago, when a group of high school students in California used the term to describe their regular meet-up time after classes: 4:20 p.m., when they relaxed following what was presumably a hard day of academia.

Here’s a calendar of events currently scheduled to take place in and around the 4/20 festivities. Thanks to theKnow for 4/20 concert details — they also have details on some more concerts happening this week.

How are you celebrating #420 this year?

Send video of you celebrating to 420@TheCannabist.Co or use #420420s for a chance to be featured in a video showing up to four hundred and twenty 4/20s around the world.

Did you know you can score free and discounted Lyft and Uber rides during Denver 4/20 festivities?

April 20 to April 23: 420 Weekend At Studio420
Noon to Midnight, $20 per day per person, all day access. Ages 21+ only.
Daily VIP $100 per person.
Studio420, 3995 S. Broadway, Englewood
Stoner activities, raffles and giveaways.
More info

April 20-23: International Church of Cannabis open house
2:00 p.m – 2:00 a.m., $10-$20
400 S. Logan St., Denver
Roundtable discussions and speeches with cannabis business leaders and policymakers. Confirmed speakers include Roben Farzad, producer and host of “Full Disclosure,” a radio show aired on NPR One, and documentarian Billy Corben, director of “Square Grouper,” chronicling Miami’s pot smuggling scene of the 1970s. Confirmed comedians include Kyle Grooms, and Ramon Rivas II.
More info

April 21: Thievery Corporation
8:00 p.m., $69.50
Fillmore Auditorium (1510 Clarkson)
If slow and low is more your jam, check out the world rhythms of music collective Thievery Corporation. You’ve probably heard its biggest song, “Lebanese Blonde,” at some Starbucks, but the grooves are more nuanced than its heady lounge-music reputation would suggest. Also performing: Thriftworks
More info

April 22 – April 23: World Cannabis Week
10:00 a.m. – 5:00 p.m.
Free (but reserving pass recommended)
Cluster Studios, 3881 Steele St
Celebrate cannabis culture! The 420 Bazaar showcases two days of vendors, food, live music, DJ’s giveaways, art installations, and more. Partake in the quintessential cannabis experience at an amazing indoor venue. The 420 Bazaar is the central hub for the 420 Shuttles.
Reserve pass and get more info

April 23: Snoop Dogg / Wiz Khalifa with special guest Cypress Hill and Berner
Doors open: 6:30 p.m./Show: 7:30 p.m.
Tickets: $64.95 online, $70 Door
Red Rocks Amphitheatre, 18300 West Alameda Parkway, Morrison
More info

Events that have passed

April 9: GoPuff Presents The Fourth Annual Denver Stoner Awards
7:00 p.m., $20 online/$25 at the door. 21+
The Bug Theatre, 3654 Navajo St., Denver
A Cannabis and Comedy Extravaganza
More info

April 14: High Holiday (420) Kickoff #SensiNight
8:00 p.m. – 2:00 a.m., RSVP for Free tickets
City Hall, 1144 Broadway, Denver
Hosted by Sensi Mag, entertainment and cannabis networking
More info.

April 18: Cannabis Social Perspective: A conversation on cannabis
5:30 p.m. (social hour), 6:30 p.m. Panel, $5
The Denver Press Club, 1330 Glenarm Pl.
The Denver Post, PRSA Colorado and The Denver Press Club present a conversation and panel discussion on cannabis. Social hour with light refreshments and a cash bar.
More info and tickets.

April 19: 420 Eve on the Rocks
Doors open at 4:00 p.m.
General admission tickets $45.00 online, $50.00 at the door
Red Rocks Amphitheatre, 18300 West Alameda Parkway Morrison
Scheduled to perform: Method Man & Redman, Flatbush ZOMBiES with Curren$y, $uicideBoy$, Futuristic, RDGLDGRN, Afroman, ProbCause
More info here or call 888.929.7849.

April 20: Denver 420 Rally – Civic Center Park
10:00 a.m. to 8:00 p.m., free
An event that bills itself as the world’s first and largest 420 marijuana rally and cultural festival returns to Civic Center Park. Grammy award-winning rapper 2 Chainz scheduled to headline.
More info

April 20: Sky’s the Limit 4/20 Party Presented by Lucy Sky Cannabis Boutique
Noon – 6:00 p.m., free
1222 Glenarm Place, Denver
Featuring a Dab Bus, shuttles to/from 420 Rally, free food, live music, games & giveaways
Registration/More info

April 20: Smokin Gun’s 420 BLOCK PARTY
1:00 p.m. – 8:00 p.m. – Free event /+21
Smokin Gun Apothecary
492 S Colorado Blvd, Glendale
More info

April 20: 420 HEAD RUSH
2:00 p.m – 2:00 a.m., $10-$20
Lincoln Station Bar, 776 Lincoln St., Denver
Music, Arts and Culture Festival

More info

April 20: O.penVAPE presents: The Art of 4/20 Party
4:00 p.m. – midnight, Admission: See directions
2201 Lawrence St, Denver
Live performances from Milky.Wav, DJ Skeena, and Dehmo. Consumption buses (no cannabis provided), live art installations, henna tattoo artists, caricature artists, and more
Mile High Spirits
More info

April 20: LITTY LIT 420 Celebration
4:20 p.m. – 11:59 p.m., Tickets: $10
Speakeasy Vape Lounge and Cannabis Club, 2508 E Bijou St, Colorado Springs
An entire day of fun and festivities.
More info

April 20: 420 On The Block
4:20 p.m. – 2:00 a.m., Tickets: March Price: $33 (limited number available)
April Price: $42, Day of Show: $50
A multi-venue event featuring music, art, comedy, speakers and other festivities.
Multiple Locations, Denver
More info

April 20: Flosstradamus
6:00 p.m.; $45.50
Red Rocks (18300 W. Alameda Parkway, Morrison)
Right before his Ogden Theatre show, Gucci Mane will open for Flosstradamus at Red Rocks. The Chicago-based DJ promises a different vibe entirely — more goofy electronic fun to contrast Mane’s snub-nosed flows.
Also performing: What So Not, Gryffin, Branchez
More info

April 20: Denver 420 After Party
6:00 p.m. – 11:30 p.m., Tickets: $10 – $100
Spectra Art Space, 1836 South Broadway, Denver
Sponsored by Club 64, 1 Blunt Radio and 710 Radio
More info

April 20: Gucci Mane TrapGod Tour
Doors open: 7:00/Show: 8:00 p.m.Ages 16 and over
Tickets: $65 online, $75 door
Ogden Theatre, 935 East Colfax, Denver
Despite producing an illustrious body of work, this is trap rapper Gucci Mane’s first official tour of his decade-plus career. He saved his 4/20 date for Denver, which promises to be a show for the books.
More info here or call (303) 832-1874

April 20: Freaky’s 4/20 Celebration
7:00 p.m.: Uncalled Four comedy game show
9:00 p.m.: Ying Yang Twins
Tickets: $15-25
The Oriental Theater (4335 W. 44th Ave. Denver)
More info

April 20: The Expendables – 4/20 Celebration
Doors 7:00 p.m. / Show 8:00 p.m., Tickets: $20 – $65
Boulder Theater, 2032 14th Street, Boulder
Also scheduled to perform: RDGLDGRN, Tribal Theory
More info

April 20: Of Montreal
8:00 p.m., $20
The Bluebird Theater, 3317 E. Colfax Ave.
The wonderfully weird Of Montreal returns to Denver with a new album, “Innocence Reaches,” in tow. Expect obtuse funk, play-worthy theatrics, and a whole lot of costume changes. Also performing: Christina Schneider’s Jepeto Solutions
More Info

April 20: DeadPhish Orchestra with Dead Floyd
Doors: 8:00 p.m./Show: 9:00 p.m. 21 and over.
Tickets: $10 – $30
Ophelia’s Electric Soapbox, 1215 20th Street , Denver
More info