California aviation events, deadlines & dates
Conferences and trade shows held in California, the state’s regulatory and tax dates, and — because they apply here too — the nationwide tax and regulatory deadlines. Subscribe to the California feed and it all lands in your own calendar.
November 2026
- Nov 2, 2026
February 2027
- Feb 1, 2027
March 2027
- Mar 15–18, 2027
April 2027
- Apr 30, 2027
August 2027
- Aug 2, 2027
November 2027
- Nov 1, 2027
KeyEventRegulatoryTaxDashed outline = date estimated or pending; confirm with the organizer before booking.
Upcoming in California
1 item- Mar 15–18, 2027
VERTICON 2027
VERTICON 2027 — organized by Helicopter Association International, Anaheim.
Nationwide dates that apply in California
5 items- Nov 2, 2026
IRS Form 720 due — federal excise tax, Q3 2026
Quarterly federal excise tax return (fuel taxes included) for Q3 2026 is due. Date rolled to the next business day where the statutory due date falls on a weekend.
- Feb 1, 2027
IRS Form 720 due — federal excise tax, Q4 2026
Quarterly federal excise tax return (fuel taxes included) for Q4 2026 is due. Date rolled to the next business day where the statutory due date falls on a weekend.
- Apr 30, 2027
IRS Form 720 due — federal excise tax, Q1 2027
Quarterly federal excise tax return (fuel taxes included) for Q1 2027 is due. Date rolled to the next business day where the statutory due date falls on a weekend.
- Aug 2, 2027
IRS Form 720 due — federal excise tax, Q2 2027
Quarterly federal excise tax return (fuel taxes included) for Q2 2027 is due. Date rolled to the next business day where the statutory due date falls on a weekend.
- Nov 1, 2027
IRS Form 720 due — federal excise tax, Q3 2027
Quarterly federal excise tax return (fuel taxes included) for Q3 2027 is due. Date rolled to the next business day where the statutory due date falls on a weekend.
Earlier in California
1 item- Mar 9–12, 2026
VERTICON 2026
VERTICON 2026 — organized by Helicopter Association International, Anaheim.
Know a California date we’re missing?
Regulator meetings, license windows, state association conferences — send the source and we’ll add it.