Article

Planetary day

Pick a date. The card takes the UTC weekday and reads the classical planet. 15 May 1990 is Tuesday and Mars. 1 January 2000 is Saturday and Saturn. 8 August 1988 is Monday and the Moon. No planetary hours and no sunrise.

The Planetary day calculator does this. It is entertainment and a tradition lesson, not a reading and not life advice.

The idea in brief

You want a planetary day. This card takes the UTC weekday and the classic planet. 15 May 1990 is Tuesday and Mars. No planetary hours and no sunrise.

A weekday planet, not planetary hours

The classic week ties days to seven planets: Sunday to the Sun, Monday to the Moon, Saturday to Saturn. A separate practice, planetary hours, splits the day from sunrise and needs a place.

This card reads the UTC weekday only. 15 May 1990 is Tuesday and Mars. 1 January 2000 is Saturday and Saturn. No sunrise, no hours, and no reading from “the hour of Mars”.

Words on this page

The short forms below belong to this card only. Another page with a similar name may compute a different rule.

UTC weekday: The only input. 15 May 1990 is Tuesday and Mars.
order: Sunday Sun, Monday Moon, Tuesday Mars, Wednesday Mercury, Thursday Jupiter, Friday Venus, Saturday Saturn.
planetary hours: This card does not compute them. They need sunrise and a place.

The day planet, not Chaldean hours

The classic order of day-planets is fixed. Planetary hours split the day from sunrise into twelve plus twelve.

This card takes only the first layer: which weekday it is. It does not fake the second.

When this helps

Situation	What the card shows
What planet is 15 May 1990?	Tuesday, Mars.
What about 1 January 2000 and 8 August 1988?	Saturday and Saturn. Monday and the Moon.
Do you compute planetary hours?	No. The whole UTC day has one day-planet.

How to read it

Mars. That Tuesday in the table: Sunday Sun, Monday Moon, Tuesday Mars.

2000-01-01 is Saturday and Saturn. 1988-08-08 is Monday and the Moon.

Example from the card

Tuesday, Saturday, Monday

15 May 1990 is Tuesday → Mars. 1 January 2000 is Saturday → Saturn. 8 August 1988 is Monday → Moon. 7 July 1977 and 22 March 2024 have their own UTC weekdays.

Typical numbers from the card

Question from the card	This card's answer
What planet is 15 May 1990?	Mars. That Tuesday in the table: Sunday Sun, Monday Moon, Tuesday Mars.
What about 1 January 2000 and 8 August 1988?	2000-01-01 is Saturday and Saturn. 1988-08-08 is Monday and the Moon.
Is this a scientific forecast?	No. It is a weekday label. Not an ephemeris and not a reading.

Typical mistakes

Mistake	What goes wrong	How to avoid it
You look for Jupiter's hour on Wednesday.	Planetary hours do not enter.	Leave sunrise and hour tables outside the card.
You take a local day after midnight in another zone.	The card stands on UTC.	Check the date in UTC if you are near midnight.
You read Mars as a quarrel fortune.	It is Tuesday's label, not a fight forecast.	Leave the weekday as a weekday.

Before you treat the result as a reading

Order: Sunday Sun, Monday Moon, Tuesday Mars, Wednesday Mercury, Thursday Jupiter, Friday Venus, Saturday Saturn.
15 May 1990 = Tuesday, Mars.
Planetary hours do not enter.
The day is counted in UTC.

Frequently asked questions

What planet is 15 May 1990?

Mars. That Tuesday in the table: Sunday Sun, Monday Moon, Tuesday Mars.

What about 1 January 2000 and 8 August 1988?

2000-01-01 is Saturday and Saturn. 1988-08-08 is Monday and the Moon.

Is this a scientific forecast?

No. It is a weekday label. Not an ephemeris and not a reading.

Do you compute planetary hours?

No. Hours need sunrise and a place. Here only the weekday.

What is the full order?

Sunday Sun, Monday Moon, Tuesday Mars, Wednesday Mercury, Thursday Jupiter, Friday Venus, Saturday Saturn.

What about 7 July 1977 and 22 March 2024?

1977-07-07 is Thursday and Jupiter. 2024-03-22 is Friday and Venus.