Last sunset of summer 2020 by Scott Glenn

Astronomical fall starts at 2:19 pm today (September 22, 2025), but that doesn’t mean that day & night are exactly equal for us here in Michigan. The very useful timeanddate.com shares that in addition to latitude & the refracting effect of our atmosphere:

One of the reasons why most locations on Earth do not enjoy exactly 12 hours of daytime and 12 hours of nighttime on the equinoxes is how sunrise and sunset are defined. If sunrise and sunset were defined as the moment the geometric center of the Sun passes the horizon, then the day and night would be exactly 12 hours long. But that is not the case. Sunrise and Sunset are defined as the exact moment the upper edge of the Sun’s disk touches the eastern and the western horizon, respectively. The time it takes for the Sun to fully set, which can be several minutes, makes the day just a bit longer than the night on the equinoxes.

The day with the same sunrise & sunset time is September 25th. The sun still does rise directly in the east & set directly in the west, so don’t forget to pack your sunglasses – a lot of our roads are laid out east/west making the sunrise and sunset around the equinox sun a positively blinding proposition!

Scott took this photo of the St Joseph Lighthouse on September 21, 2020. See more in his awesome Lighthouses gallery on Flickr & enjoy a selfie he took of the last summer sunset of 2014 below!

Last Summer Sunset Selfie by Scott Glenn