Daylight World Map for Android

Shows which parts of the world are in daylight, which are in twilight, and which are in darkness. The approximate positions of the sun and moon (projected on to the Earth) are also shown.

Various locations around the world can be selected, and the date and time can be changed. For the currently selected location and the current date and time, information such as the number of daylight hours and sunrise/sunset times are shown in an information panel.

The map can also be animated to show the passage of light and shadow across the surface of the Earth over time. The speed can be selected using the "Time Step" control.

The program makes some approximations; do not rely on the results to be totally accurate, they are intended as a guide only.

Recent Update

29 Jan 2018
Daylight World Map V2.63 released - Update and improve dialogs; set local instead of UTC time.

Announcements

Force close errors? The most common cause of the app crashing is the phone running out of memory, especially when zooming in. Some developments are planned to use memory more efficiently to help avoid this problem. In the meantime, if your phone has limited memory, try closing other apps, or is possible avoid zooming in too much!

Newest games:
Word Star - A multiplayer game of creating words against the clock.
Twins Memory Tournament - Puzzle game to test your memory and train your brain.
Quiz Quest - Join Professor Android for this multiplayer online quiz challenge.

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Recent comments

Screen saver
Is it possible to make the full screen into a screen saver while plugged in? That would be a great feature

posted 2018-01-03 by Paul

Good suggestion. The problem is, the phone will usually turn itself off after a period, even when charging.

However, you may be able to prevent this from happening, there are some details here:
https://www.greenbot.com/article/2463970/how-to-keep-your-android-phones-screen-on-longer.html

Hope that helps

Won't widget
I can't get the app to run as a widget any more on my Samsung 5A.

posted 2017-07-22 by Ed

Moon Data
Please add moon data like rise/set times, % full, az/el,  lat/long. This is a great app!

posted 2016-05-27 by George Stein

widget display
The most simple way to centre the widget image is to use the stored preferred location (lat DDD MM, long DDD MM) before searching.
John.

posted 2016-05-25 by John

Map construction
Your Moon is under the night shadow so that it appears to dim. REDRAW it to shine on top. DRAW a map centered on Sydney Australia. SPLITTING the map up the Atlantic Ocean shows Melanesia and Micronesia and Iceland as a whole. ALSO add a day/date/midnight short line on top of the night mask at the bottom of the map to show many terminations.
  John

posted 2016-05-24 by John

In the app itself, the map can of course centred on a specific location, or on the sun's position. This feature is  not (yet) available on the widget however.

Fair point about the moon during the night, it should be brighter.

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