Planetary hours
in Surabaya.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Tuesday, 23 December 2025: day of Mars
- Sunrise
- 05:11
- Sunset
- 17:44
- Next sunrise
- 05:12
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Jakarta).
Day
- 1♂︎ Mars05:11 – 06:14
- 2☉︎ Sun06:14 – 07:17
- 3♀︎ Venus07:17 – 08:19
- 4☿︎ Mercury08:19 – 09:22
- 5☽︎ Moon09:22 – 10:25
- 6♄︎ Saturn10:25 – 11:28
- 7♃︎ Jupiter11:28 – 12:30
- 8♂︎ Mars12:30 – 13:33
- 9☉︎ Sun13:33 – 14:36
- 10♀︎ Venus14:36 – 15:38
- 11☿︎ Mercury15:38 – 16:41
- 12☽︎ Moon16:41 – 17:44
Night
- 1♄︎ Saturn17:44 – 18:41
- 2♃︎ Jupiter18:41 – 19:39
- 3♂︎ Mars19:39 – 20:36
- 4☉︎ Sun20:36 – 21:33
- 5♀︎ Venus21:33 – 22:30
- 6☿︎ Mercury22:30 – 23:28
- 7☽︎ Moon23:28 – 00:25
- 8♄︎ Saturn00:25 – 01:22
- 9♃︎ Jupiter01:22 – 02:20
- 10♂︎ Mars02:20 – 03:17
- 11☉︎ Sun03:17 – 04:14
- 12♀︎ Venus04:14 – 05:12
Other cities · Indonesia
Questions
How are the planetary hours calculated in Surabaya?
On Tuesday, 23 December 2025, the Sun rises at 05:11 and sets at 17:44: the day lasts 12h 33m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 05:12, lasts 11h 28m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Mars, from 05:11 to 06:14: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.