Planetary hours
in Sai Mai.
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 Friday, 14 August 2026: day of Venus
- Sunrise
- 06:04
- Sunset
- 18:40
- Next sunrise
- 06:04
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Bangkok).
Day
- 1♀︎ Venus06:04 – 07:07
- 2☿︎ Mercury07:07 – 08:10
- 3☽︎ Moon08:10 – 09:13
- 4♄︎ Saturn09:13 – 10:16
- 5♃︎ Jupiter10:16 – 11:19
- 6♂︎ Mars11:19 – 12:22
- 7☉︎ Sun12:22 – 13:25
- 8♀︎ Venus13:25 – 14:28
- 9☿︎ Mercury14:28 – 15:31
- 10☽︎ Moon15:31 – 16:34
- 11♄︎ Saturn16:34 – 17:37
- 12♃︎ Jupiter17:37 – 18:40
Night
- 1♂︎ Mars18:40 – 19:37
- 2☉︎ Sun19:37 – 20:34
- 3♀︎ Venus20:34 – 21:31
- 4☿︎ Mercury21:31 – 22:28
- 5☽︎ Moon22:28 – 23:25
- 6♄︎ Saturn23:25 – 00:22
- 7♃︎ Jupiter00:22 – 01:19
- 8♂︎ Mars01:19 – 02:16
- 9☉︎ Sun02:16 – 03:13
- 10♀︎ Venus03:13 – 04:10
- 11☿︎ Mercury04:10 – 05:07
- 12☽︎ Moon05:07 – 06:04
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Questions
How are the planetary hours calculated in Sai Mai?
On Friday, 14 August 2026, the Sun rises at 06:04 and sets at 18:40: the day lasts 12h 36m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 06:04, lasts 11h 24m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Venus, from 06:04 to 07:07: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.