Planetary hours
in Calgary.
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 Saturday, 20 December 2025: day of Saturn
- Sunrise
- 08:37
- Sunset
- 16:31
- Next sunrise
- 08:37
A day hour lasts 40 min; a night hour, 1h 21m. Local time (America/Edmonton).
Day
- 1♄︎ Saturn08:37 – 09:16
- 2♃︎ Jupiter09:16 – 09:56
- 3♂︎ Mars09:56 – 10:35
- 4☉︎ Sun10:35 – 11:15
- 5♀︎ Venus11:15 – 11:54
- 6☿︎ Mercury11:54 – 12:34
- 7☽︎ Moon12:34 – 13:13
- 8♄︎ Saturn13:13 – 13:53
- 9♃︎ Jupiter13:53 – 14:32
- 10♂︎ Mars14:32 – 15:12
- 11☉︎ Sun15:12 – 15:51
- 12♀︎ Venus15:51 – 16:31
Night
- 1☿︎ Mercury16:31 – 17:51
- 2☽︎ Moon17:51 – 19:12
- 3♄︎ Saturn19:12 – 20:32
- 4♃︎ Jupiter20:32 – 21:53
- 5♂︎ Mars21:53 – 23:13
- 6☉︎ Sun23:13 – 00:34
- 7♀︎ Venus00:34 – 01:54
- 8☿︎ Mercury01:54 – 03:15
- 9☽︎ Moon03:15 – 04:36
- 10♄︎ Saturn04:36 – 05:56
- 11♃︎ Jupiter05:56 – 07:17
- 12♂︎ Mars07:17 – 08:37
Other cities · Canada
Questions
How are the planetary hours calculated in Calgary?
On Saturday, 20 December 2025, the Sun rises at 08:37 and sets at 16:31: the day lasts 7h 54m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:37, lasts 16h 06m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Saturn, from 08:37 to 09:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.