The Cannabis Calendar · US + Canada

Every date the cannabis industry runs on, in one calendar.

Trade shows and conferences, the retail sales days that move the year (4/20, Green Wednesday, 7/10), ballot measures and federal policy dates, and the state licensing, regulatory and tax deadlines that operators actually have to hit. Filter by type, state or the part of the industry you serve — and subscribe from Google, Apple or Outlook so it lives in your own calendar.

98 dated items11 states with pages32 industry eventsChecked against organizer & regulator sources

StateRelevant toSearch

Sun

Mon

Tue

Wed

Thu

Fri

Sat

KeyEventSalesPolicyRegulatoryTaxCultureDashed outline = date estimated or pending; confirm with the organizer before booking.

Next 60 days

18 items

Sep 15, 2026
Extended federal return due — partnerships & S-corps; Q3 estimates
Tax deadlines
Extended 1065 / 1120-S returns are due; third-quarter estimated tax payment due.
IRS — filing deadlines ↗Add to calendar
Sep 15–16, 2026
Flower Expo Illinois
Industry eventsChicago, ILThe Geraghty
Illinois B2B cannabis trade show connecting brands with retailers, at The Geraghty in Chicago. Dates confirmed on the organizer's site.
Organizer: The Flower Expo Flower Expo — Illinois ↗Add to calendar
Sep 18–19, 2026
37th Annual Boston Freedom Rally
Awareness & cultureBoston, MA
37th annual Boston Freedom Rally, MassCann/NORML's two-day cannabis-reform rally. Dates confirmed on masscann.org; the rally is traditionally held on Boston Common.
Organizer: Boston Freedom Rally The Boston Freedom Rally ↗Add to calendar
Sep 18–19, 2026
NECANN New Jersey Cannabis Convention + NECANN Cup
Industry eventsAtlantic City, NJAtlantic City Convention Center
NECANN's New Jersey convention — exhibitors, education and networking for the Garden State market, alongside the NECANN Cup competition.
Organizer: NECANN NECANN — New Jersey ↗Add to calendar
Sep 23–24, 2026
Ohio Cannabis Health & Business Summit
Industry eventsColumbus, OHGreater Columbus Convention Center
State-focused summit for Ohio's medical and adult-use market at the Greater Columbus Convention Center. Dates confirmed on the organizer's site (the 'Oct 3 Cleveland' listing elsewhere is a stale 2023 page).
Ohio Cannabis Health & Business Summit ↗Add to calendar
Oct 13–15, 2026
CHAMPS Trade Show — Austin
Industry eventsAustin, TXPalmer Events Center
CHAMPS' fall Texas edition at the Palmer Events Center. Dates confirmed on the organizer's site.
Organizer: CHAMPS Trade Shows CHAMPS — Austin October 2026 ↗Add to calendar
Oct 14–15, 2026
MJ Unpacked — Kansas City
Industry eventsKansas City, MOSheraton Crown Center
Curated conference and expo for licensed operators, brands and retailers, with investor programming. Pre-conference activities October 13.
Organizer: MJ Unpacked MJ Unpacked ↗Add to calendar
Oct 15, 2026
Extended federal return due — C-corps & individuals
Tax deadlines
Extended 1120 and 1040 returns are due.
IRS — filing deadlines ↗Add to calendar
Oct 19–21, 2026
National Cannabis Research Conference
Industry eventsSan Diego, CADoubleTree by Hilton Mission Valley
Research conference organised by the Institute of Cannabis Research with the National Interdisciplinary Cannabis Symposium — cannabis science, agronomy and health. Dates confirmed on the organizer's site.
National Cannabis Research Conference ↗Add to calendar
Oct 21–22, 2026
Hall of Flowers — New York
Industry eventsNew York, NY
Curated B2B trade show pairing licensed New York retailers with brands and ancillary providers.
Organizer: Hall of Flowers Hall of Flowers ↗Add to calendar
Oct 26, 2026
State of the Cannabis Industry Conference (Blank Rome, 10th annual)
Industry eventsBoston, MAOmni Boston Hotel at the Seaport
Blank Rome's tenth annual one-day Boston conference on the state of the industry — legal, finance and policy panels. Date confirmed via the organizer's registration page.
Registration (Eventbrite) ↗Add to calendar
Oct 31, 2026
Halloween
Retail sales dates
Edibles-led promotional day; no industry-wide lift figure published.
Add to calendar
Nov 2, 2026
California cannabis excise tax return due — Q3 (Jul–Sep)
Tax deadlines
Cannabis retailers file the CDTFA cannabis retailer excise tax return and payment for Q3 (Jul–Sep). The excise rate is 15% through June 30, 2028 (AB 564).
CDTFA — cannabis retailers ↗Add to calendar
Nov 3, 2026
US midterm election — cannabis measures on the ballot
Policy & votes
Statewide cannabis questions certified for November 3: Massachusetts Question 8 (repeal the adult-use market while keeping medical) and Idaho HJR 4 (reserve legalization authority to the legislature, blocking citizen initiatives). Florida's adult-use amendment, Idaho medical, and Nebraska adult-use did not qualify. Local measures include California cannabis tax questions (Arroyo Grande, Guadalupe) and Michigan opt-in votes.
Ballotpedia — 2026 ballot measures ↗Add to calendar
Nov 4–5, 2026
Hall of Flowers — Sacramento (Northern California)
Industry eventsSacramento, CA
Hall of Flowers' fall California show, relocated from Santa Rosa to Sacramento for 2026. Curated retailer–brand trade show; venue to be announced.
Organizer: Hall of Flowers Hall of Flowers ↗Add to calendar
Nov 4–5, 2026
Karma '26 (13th Annual Karma Cup)
Awareness & cultureToronto, ON · Canada
13th annual Karma Cup — judging on November 4, awards ceremony on November 5, per thekarmacup.com. Toronto venue not yet published.
Organizer: The Karma Cup Karma '26 ↗Add to calendar
Nov 5–6, 2026
Cannabis Clinical Outcomes Research Conference (CCORC)
Industry eventsOrlando, FLUF Research and Academic Center at Lake Nona
Sixth annual clinical-research conference hosted by the University of Florida's Consortium for Medical Marijuana Clinical Outcomes Research, at the UF Academic and Research Center at Lake Nona. Dates confirmed on the conference site.
CCORC 2026 ↗Add to calendar
Nov 7, 2026
Florida CannFest
Awareness & cultureMount Dora, FLRenninger's
Cannabis culture festival — live music, vendors, glass artists and food trucks — at Renninger's in Mount Dora.
Organizer: Florida CannFest Florida CannFest ↗Add to calendar

Browse by state

Browse by month

Guides

Cannabis retail sales holidays — the planning guide

How the calendar is kept

Sourced, not scraped

A date is confirmed only when it comes from the organizer, the regulator or an official government source. Anything from a third-party list is shown as est. until we’ve checked it, and every item shows the date it was last checked.

Reviewed monthly

Every item inside the next 120 days is re-checked against its source each month; recurring dates (sales holidays, tax deadlines) are rolled forward a year ahead. Legislation with a moving effective date is flagged date pending.

Free to be listed

Organizers get a free profile in the Register and can claim it to keep dates current. Placement is never sold; if that ever changes, it will be labelled.

Run an event, or spot a wrong date?

Send it in — a person reads every submission and checks it against the source before it goes on the calendar.

Submit or correct a date