Starting on the Equinox

August 1, 2018 by Elizabeth Howard

Starting on the Equinox (September 23), report your day length every month throughout the coming year.

Simon Eugster

What to Report

  • Report you day length for the equinox, September 22, 2018.
  • Report your signs of October.

How to Report your Day Length (Photoperiod)

Step 1: Look up your sunrise/sunset for September 22.

Step 2: Calculate the length of time between sunrise and sunset. 

Step 3: Report your day length for September 22.

Step 4: Explore the daylight map.

How to Participate

Report on the 20th of every month, and on each equinox and solstice. Track changes in daylight over the course of the year on the sunlight map. Explore how day length changes in your part of the world as the Earth revolves around the Sun. Share and compare seasonal observations with people around the globe.

Track the Changes in Sunlight and the Seasons