Planetary hours
in Saitama.
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 Wednesday, 13 May 2026: day of Mercury
- Sunrise
- 04:37
- Sunset
- 18:38
- Next sunrise
- 04:37
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Asia/Tokyo).
Day
- 1☿︎ Mercury04:37 – 05:47
- 2☽︎ Moon05:47 – 06:57
- 3♄︎ Saturn06:57 – 08:07
- 4♃︎ Jupiter08:07 – 09:17
- 5♂︎ Mars09:17 – 10:27
- 6☉︎ Sun10:27 – 11:37
- 7♀︎ Venus11:37 – 12:47
- 8☿︎ Mercury12:47 – 13:58
- 9☽︎ Moon13:58 – 15:08
- 10♄︎ Saturn15:08 – 16:18
- 11♃︎ Jupiter16:18 – 17:28
- 12♂︎ Mars17:28 – 18:38
Night
- 1☉︎ Sun18:38 – 19:27
- 2♀︎ Venus19:27 – 20:17
- 3☿︎ Mercury20:17 – 21:07
- 4☽︎ Moon21:07 – 21:57
- 5♄︎ Saturn21:57 – 22:47
- 6♃︎ Jupiter22:47 – 23:37
- 7♂︎ Mars23:37 – 00:27
- 8☉︎ Sun00:27 – 01:17
- 9♀︎ Venus01:17 – 02:07
- 10☿︎ Mercury02:07 – 02:57
- 11☽︎ Moon02:57 – 03:47
- 12♄︎ Saturn03:47 – 04:37
Questions
How are the planetary hours calculated in Saitama?
On Wednesday, 13 May 2026, the Sun rises at 04:37 and sets at 18:38: the day lasts 14h 00m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 04:37, lasts 9h 59m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Mercury, from 04:37 to 05:47: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.