|Track Changes in Day Length|
Explore how day length changes in your part of the world as the Earth revolves around the Sun. Share and compare observations with people around the globe.
Report your photoperiod:
1. Report for dates listed below.
2. Find your sunrise/sunset: Look-up
3. Calculate your daylength.
4. Report your daylength: Select "Daylight"
Photoperiod is the length of time between sunrise and sunset.