Autumnal Equinox

September 20, 2019 by Team Journey North

September 23 at 3:50 A.M. (EDT) is the official start of Fall.

“View from Enger Tower in Duluth. Some tree tops are showing a tinge of yellow and rust.” Photo by: Sarah (09/01/2019)

Autumnal Equinox

Monday, September 23 at 3:50 A.M. (EDT) is the official start of Fall — also called the autumnal equinox or the September equinox. On this day, fall begins in the Northern Hemisphere and spring begins in the Southern Hemisphere. Don’t forget to report the daylength on September 23rd. 

What to Report

  • Report you day length for the equinox, September 23, 2019.
  • Report your “Signs of Fall” to Journey North.

How to Report your Day Length (Photoperiod)


Step 1: Look up your sunrise/sunset for September 23.

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

Step 3: Report your day length for September 23.

Step 4: Explore the daylight map and compare your part of the world with other locations as the Earth revolves around the Sun.

Step 5: Watch the Signs of Fall map and share and compare seasonal observations with people around the globe.