Jakub Hałun – Apps – Daylight: Changelog

29th of August, 2026

The sun calculation is now year-aware: it used constants that only held for one particular year, so the same date always got the same answer whichever year was asked about. Sunrise and sunset times are now accurate to a few seconds instead of a few minutes, the December solstice is no longer a day early in some years, and the end of a polar day or polar night is right at the highest latitudes.

25th of August, 2026

A location can now be entered as coordinates, either as signed decimals or as degrees, minutes and seconds, with the two formats interchangeable and with copy & paste support. This makes places with no nearby town reachable at last – a cabin, a summit, a trailhead or a point at sea.
Hand-entered coordinates now get their real local time zone, worked out offline from timezone boundary data bundled with the application. It covers the whole globe, oceans included. Previously such a point could fall back to the phone’s own time zone and show confident but completely wrong times for remote places.
Fixed an empty “Next Sunset” / “Next Sunrise” card on the polar screens very close to the poles, where no date, time or countdown was shown at all. The reported date was also corrected for latitudes above about 86°.
The end of a polar day or polar night is now given as an exact moment rather than rounded to midnight of the transition day, so the countdown to it is exact too.
Fixed a rounding error in the sunrise and sunset calculation. It shifted the times by up to half an hour in half-hour and quarter-hour time zones (India, Iran, Nepal, Newfoundland and others) and by up to 24 minutes at whole-degree coordinates. Times now agree with reference data to about a minute everywhere.
After a while of regular use the application may ask once, through Google Play’s own rating sheet, for a review.

28th of July, 2026

New compact “Sun countdown” home screen widget: a small tile, two columns wide and one row high, showing a single value – how much time is left until the next sunrise or sunset, or until the end of a polar day or polar night. Its light or dark look follows the sun at its location rather than the phone theme. It shares the location setting with the existing “Daylight today” widget.
The sunrise and sunset alarms can now ring up to 60 minutes before the event, instead of 30.
Internal build toolchain upgrade, with no change to how the application behaves.

7th of July, 2026

First public release on Google Play.
Circular 24-hour sun dial showing sunrise, sunset and the length of the day, with the current moment marked on it. The whole view can be enlarged with pinch-to-zoom up to 3×.
Comparisons between consecutive days, down to the second, together with the difference to the shortest and the longest day of the year and a countdown to the next solstice.
Dedicated polar day (Midnight Sun) and polar night views for high latitudes, each with the date of the next sunset or sunrise and a countdown to it.
Fully offline operation, including searching for a place by name: the application ships with an embedded database of about 68,000 cities and towns, which also names the position read from the device. Recently used locations are offered for one-tap reuse.
The location permission is optional – the application is fully usable with manually selected locations, and the device location is only ever read on an explicit tap, never in the background.
Any date up to five years back or ahead can be selected.
One-shot sunrise and sunset alarms with a choice of sound and a lead time, surviving a phone restart.
“Daylight today” home screen widget with its own location setting.
TalkBack support, with the sun dial read out as a spoken summary.
Free and supported by a single banner advertisement at the bottom of the screen, with a consent dialog where the law requires one.