- #1
hodges
- 11
- 0
I've wondered this for a few years now. I have a list of local sunrise and sunset times, and I notice that, as the seasons change, sunrise and sunset times don't change symmetrically. I thought the listed times might just be wrong, but I do observe times close to these each year.
Here is an example. For my location, here are some sunrise/sunset times in early winter:
December 1 7:26AM 4:45PM
December 15 7:39AM 4:41PM
January 1 7:46AM 4:51PM
January 15 7:43AM 5:06PM
February 1 7:30AM 5:28PM
Look at the date range December 1 to January 1 for example. During that time period, 20 minutes of daylight is lost in the morning, but 6 minutes is actually gained in the evening. Shouldn't the shortening and lengthening of days with seasons be symmetrical about local noon?
Here is an example. For my location, here are some sunrise/sunset times in early winter:
December 1 7:26AM 4:45PM
December 15 7:39AM 4:41PM
January 1 7:46AM 4:51PM
January 15 7:43AM 5:06PM
February 1 7:30AM 5:28PM
Look at the date range December 1 to January 1 for example. During that time period, 20 minutes of daylight is lost in the morning, but 6 minutes is actually gained in the evening. Shouldn't the shortening and lengthening of days with seasons be symmetrical about local noon?