Planetary hours
in Roubaix.
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, 21 January 2026: day of Mercury
- Sunrise
- 08:37
- Sunset
- 17:20
- Next sunrise
- 08:36
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:37 – 09:20
- 2☽︎ Moon09:20 – 10:04
- 3♄︎ Saturn10:04 – 10:48
- 4♃︎ Jupiter10:48 – 11:31
- 5♂︎ Mars11:31 – 12:15
- 6☉︎ Sun12:15 – 12:58
- 7♀︎ Venus12:58 – 13:42
- 8☿︎ Mercury13:42 – 14:26
- 9☽︎ Moon14:26 – 15:09
- 10♄︎ Saturn15:09 – 15:53
- 11♃︎ Jupiter15:53 – 16:36
- 12♂︎ Mars16:36 – 17:20
Night
- 1☉︎ Sun17:20 – 18:36
- 2♀︎ Venus18:36 – 19:53
- 3☿︎ Mercury19:53 – 21:09
- 4☽︎ Moon21:09 – 22:25
- 5♄︎ Saturn22:25 – 23:42
- 6♃︎ Jupiter23:42 – 00:58
- 7♂︎ Mars00:58 – 02:14
- 8☉︎ Sun02:14 – 03:30
- 9♀︎ Venus03:30 – 04:47
- 10☿︎ Mercury04:47 – 06:03
- 11☽︎ Moon06:03 – 07:19
- 12♄︎ Saturn07:19 – 08:36
Other cities · France
Questions
How are the planetary hours calculated in Roubaix?
On Wednesday, 21 January 2026, the Sun rises at 08:37 and sets at 17:20: the day lasts 8h 43m, that is twelve day hours of 44 min. The night, until the next sunrise at 08:36, lasts 15h 16m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Mercury, from 08:37 to 09:20: 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.