Longest and shortest day in Viana
In Viana, Angola, the longest day of 2026 is around the December solstice on Monday, 21 December 2026, with 12h 39m of daylight, and the shortest is around the June solstice on Sunday, 21 June 2026, with 11h 36m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:10 | 18:17 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 06:20 | 17:56 | 11h 36m |
| September equinox | Tuesday, 22 September 2026 | 05:56 | 18:02 | 12h 6m |
| December solstice | Monday, 21 December 2026 | 05:45 | 18:23 | 12h 39m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 05:58 | 18:33 | 12h 35m |
| February | 06:09 | 18:32 | 12h 23m |
| March | 06:10 | 18:20 | 12h 9m |
| April | 06:09 | 18:03 | 11h 54m |
| May | 06:11 | 17:54 | 11h 43m |
| June | 06:18 | 17:55 | 11h 36m |
| July | 06:23 | 18:02 | 11h 39m |
| August | 06:16 | 18:05 | 11h 49m |
| September | 06:00 | 18:03 | 12h 3m |
| October | 05:43 | 18:01 | 12h 18m |
| November | 05:35 | 18:06 | 12h 31m |
| December | 05:42 | 18:20 | 12h 39m |
Why the day gets longer and shorter in Viana
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Viana leans toward the Sun for part of the year and away for the rest. When it leans toward the Sun the days lengthen and the Sun climbs higher; half a year later the opposite happens. The size of the swing depends on how far Viana sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Viana
When is the longest day in Viana?
The longest day in Viana falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 12h 39m of daylight, sunrise at 05:45 and sunset at 18:23.
When is the shortest day in Viana?
The shortest day in Viana falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 11h 36m of daylight, sunrise at 06:20 and sunset at 17:56.
How much does day length change through the year in Viana?
Between the longest and shortest day, Viana gains and loses about 1h 3m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Viana's coordinates with SunCalc, not looked up from a table.