Planetary hours
in Nagoya.
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, 28 October 2025: day of Mars
- Sunrise
- 06:09
- Sunset
- 17:02
- Next sunrise
- 06:10
A day hour lasts 54 min; a night hour, 1h 06m. Local time (Asia/Tokyo).
Day
- 1♂︎ Mars06:09 – 07:04
- 2☉︎ Sun07:04 – 07:58
- 3♀︎ Venus07:58 – 08:52
- 4☿︎ Mercury08:52 – 09:47
- 5☽︎ Moon09:47 – 10:41
- 6♄︎ Saturn10:41 – 11:35
- 7♃︎ Jupiter11:35 – 12:30
- 8♂︎ Mars12:30 – 13:24
- 9☉︎ Sun13:24 – 14:19
- 10♀︎ Venus14:19 – 15:13
- 11☿︎ Mercury15:13 – 16:07
- 12☽︎ Moon16:07 – 17:02
Night
- 1♄︎ Saturn17:02 – 18:07
- 2♃︎ Jupiter18:07 – 19:13
- 3♂︎ Mars19:13 – 20:19
- 4☉︎ Sun20:19 – 21:24
- 5♀︎ Venus21:24 – 22:30
- 6☿︎ Mercury22:30 – 23:36
- 7☽︎ Moon23:36 – 00:42
- 8♄︎ Saturn00:42 – 01:47
- 9♃︎ Jupiter01:47 – 02:53
- 10♂︎ Mars02:53 – 03:59
- 11☉︎ Sun03:59 – 05:04
- 12♀︎ Venus05:04 – 06:10
Questions
How are the planetary hours calculated in Nagoya?
On Tuesday, 28 October 2025, the Sun rises at 06:09 and sets at 17:02: the day lasts 10h 53m, that is twelve day hours of 54 min. The night, until the next sunrise at 06:10, lasts 13h 08m: twelve night hours of 1h 06m.
Which planet rules the first hour that day?
Mars, from 06:09 to 07:04: 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.