Season

The season integration will provide the current astronomical or meteorological season (Spring, Summer, Autumn, Winter) as a sensor.

Configuration

To add the Season integration to your Home Assistant instance, use this My button:

For information on the difference between astronomical and meteorological seasons please see the link below:

All information about how the seasons work was taken from Wikipedia:

To cut a long read short, Astronomical gives seasons based on the shortest/longest day and equinoxes. So in the Northern Hemisphere spring starts on 20 March). Meteorological gives seasons based on months (so in the Northern Hemisphere spring starts on 1 March).