Public and cultural dates
When is Seasons (Astronomical) 2026?
Watch the year turn a corner.
Seasons (Astronomical) is Wednesday, 23 September 2026.
The calendar file includes a reminder one day before. You can change or remove it in your calendar app.
A little head start
Make it your own
A small calendar marker for the equinoxes and solstices.
See the next published seasonal marker.
Plan a walk or a moment outdoors.
Keep astronomical dates distinct from weather forecasts.
One occasion. Your choice.
Add it to My Dates, then choose whether it belongs in your calendar. SMS reminders are a separate option.