Katherine Schlatter
🌞 Daylight Hours Calculator 🌙
Discover how daylight changes across America throughout the year!
🗺️ Choose a City to Explore
Click on any city in the map below to see how daylight changes throughout the year!
👆 Click on a city in the map above to start exploring!
Each city shows different amounts of daylight depending on how far north or south it is.
📸 Map Image Credits & Attribution
NASA Earth Observatory – United States at Night
Image acquired: April 18 – October 23, 2012
Instrument: Suomi NPP – VIIRS (Visible Infrared Imaging Radiometer Suite)
This composite image uses the satellite’s “day-night band” to detect city lights and other dim signals across wavelengths from green to near-infrared.
Projection: Albers equal-area conic, WGS84 datum, standard parallels 29.5°N and 44.5°N, central meridian 96°W
This file is in the public domain because it was created by NASA.
Source: NASA Earth Observatory
📅 THIS MONTH™
Part of The Instant Guide Series
Timely, standards-aligned educational activities connecting learning to the calendar. Designed for K-5th grade classrooms and families.
🌟 Explore more Instant Guides:
Solstices & Equinoxes •
Moon Phases •
And More!
