Daylight hours in Biên Hòa
Biên Hòa gets 12h 46m of daylight on its longest day in June, and 11h 29m on its shortest in December — a difference of 1h 16m across the year.
How fast the days change
Around 22 March, Biên Hòa gains or loses about 0.6 minutes of daylight every day.
Barely perceptible — near the equator the length of the day hardly changes at all, and the seasons announce themselves through rain and heat instead.
Sunrise and sunset by month
On the 15th of each month, in Asia/Ho_Chi_Minh local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 06:15 | 17:48 | 11h 33m | 12:02 |
| February | 06:13 | 18:00 | 11h 47m | 12:06 |
| March | 05:59 | 18:03 | 12h 03m | 12:01 |
| April | 05:41 | 18:03 | 12h 22m | 11:52 |
| May | 05:30 | 18:07 | 12h 38m | 11:49 |
| June | 05:30 | 18:16 | 12h 46m | 11:53 |
| July | 05:37 | 18:19 | 12h 42m | 11:58 |
| August | 05:42 | 18:11 | 12h 29m | 11:57 |
| September | 05:42 | 17:53 | 12h 11m | 11:48 |
| October | 05:41 | 17:35 | 11h 54m | 11:38 |
| November | 05:48 | 17:25 | 11h 38m | 11:37 |
| December | 06:03 | 17:32 | 11h 29m | 11:47 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 05:56 | 18:03 | 12h 07m |
| June solstice | 21 Jun | 05:31 | 18:17 | 12h 46m |
| September equinox | 22 Sep | 05:41 | 17:49 | 12h 07m |
| December solstice | 21 Dec | 06:06 | 17:35 | 11h 29m |
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.
Other cities in Vietnam
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.