howmuchsun

Daylight hours in Stanley

Stanley gets 16h 38m of daylight on its longest day in December, and 7h 49m on its shortest in June — a difference of 8h 49m across the year.

How fast the days change

Around 12 March, Stanley gains or loses about 4.0 minutes of daylight every day.

That is quick enough to notice week to week, which is why spring seems to arrive all at once this far from the equator.

Sunrise and sunset by month

On the 15th of each month, in Atlantic/Stanley local time, daylight saving included.

MonthSunriseSunsetDaylightSolar noon
January 04:57 21:04 16h 06m 13:00
February 05:54 20:16 14h 22m 13:05
March 06:44 19:15 12h 31m 13:00
April 07:37 18:05 10h 29m 12:51
May 08:24 17:10 8h 46m 12:47
June 08:57 16:46 7h 49m 12:51
July 08:50 17:04 8h 15m 12:57
August 08:03 17:48 9h 45m 12:55
September 06:55 18:37 11h 42m 12:46
October 05:47 19:27 13h 40m 12:37
November 04:48 20:23 15h 34m 12:36
December 04:27 21:05 16h 38m 12:46

Solstices and equinoxes

DateSunriseSunsetDaylight
March equinox 20 Mar 06:53 19:04 12h 11m
June solstice 21 Jun 08:59 16:47 7h 48m
September equinox 22 Sep 06:39 18:48 12h 09m
December solstice 21 Dec 04:29 21:09 16h 40m

The equinoxes give almost exactly twelve hours of daylight everywhere on earth — "almost" because sunrise is defined by the sun's upper edge rather than its centre, and the atmosphere bends its light over the horizon before it has really arrived. Both lengthen the day by a few minutes.

Assumptions

  • Sea-level horizon. Hills, mountains and buildings all delay sunrise and bring sunset forward, sometimes by a lot in a valley.
  • Standard refraction. Sunrise is taken at −0.833°, allowing for the sun's disc and average atmospheric bending. Unusual air conditions shift it by a minute or two.
  • Local clock time, with daylight saving applied from the IANA timezone database.

Full methodology, sources and known limitations