Daylight   

Report your photoperiod on the 20th of every month, and on each equinox and solstice. Track changes in daylight over the course of the year on the daylight map. Explore how daylight length changes in your part of the world as the Earth revolves around the Sun.

Signs of Spring

A splash of yellow here. A fleeting blur of blues and reds over there. Signs of spring are appearing everywhere across North America. What are you observing? 

Bernice in Mountain Top, PA: "Male Rose-breasted Grosbeak." (05/13/2022)

Sharon in Hudson, IN: "Tiger Swallowtail butterfly.. along our shoreline." (05/15/2022)

How to Participate

• Report you daylight length for May 20, 2022.
• Report seasonal signs of spring.

How to Report your Day Length (Photoperiod)

Step 1: Look up your sunrise/sunset on the 20th of every month.

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

Step 3: Report your daylight length on the 20th of every month.

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