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Hora (Planetary Hour) Calculator
Calculate the planetary hours for any day based on ancient Chaldean astrology

New York (Default)

Day Ruler

Venus

Friday

Sunrise

7:05 AM

Day: 9h 50m

Sunset

4:55 PM

Night: 14h 10m

Day Hours (Sunrise to Sunset)
7:05 AM - 4:55 PM
Venus

7:05 AM - 7:54 AM

Mercury

7:54 AM - 8:43 AM

Moon

8:43 AM - 9:32 AM

Saturn

9:32 AM - 10:21 AM

Jupiter

10:21 AM - 11:10 AM

Mars

11:10 AM - 12:00 PM

Sun

12:00 PM - 12:49 PM

Venus

12:49 PM - 1:38 PM

Mercury

1:38 PM - 2:27 PM

Moon

2:27 PM - 3:16 PM

Saturn

3:16 PM - 4:05 PM

Jupiter

4:05 PM - 4:55 PM

Night Hours (Sunset to Sunrise)
4:55 PM - 7:05 AM (next day)
Mars

4:55 PM - 6:05 PM

Sun

6:05 PM - 7:16 PM

Venus

7:16 PM - 8:27 PM

Mercury

8:27 PM - 9:38 PM

Moon

9:38 PM - 10:49 PM

Saturn

10:49 PM - 12:00 AM

Jupiter

12:00 AM - 1:10 AM

Mars

1:10 AM - 2:21 AM

Sun

2:21 AM - 3:32 AM

Venus

3:32 AM - 4:43 AM

Mercury

4:43 AM - 5:54 AM

Moon

5:54 AM - 7:05 AM

Planetary Hour Guide
What to do during each planet's hour

Sun

Themes:

Success, Leadership, Vitality, Recognition, Authority

Good for:

  • Starting projects
  • Public appearances
  • Health matters

Avoid:

  • Secretive activities
  • Quiet reflection

Moon

Themes:

Emotions, Intuition, Home, Family, Dreams

Good for:

  • Domestic matters
  • Nurturing activities
  • Dream work

Avoid:

  • Long-term decisions
  • Rational analysis

Mars

Themes:

Action, Courage, Competition, Energy, War

Good for:

  • Physical activity
  • Confrontations
  • Surgery

Avoid:

  • Diplomacy
  • Peaceful negotiations

Mercury

Themes:

Communication, Learning, Travel, Commerce, Writing

Good for:

  • Writing
  • Speaking
  • Short trips

Avoid:

  • Long-term contracts
  • Physical labor

Jupiter

Themes:

Expansion, Luck, Wisdom, Abundance, Philosophy

Good for:

  • Legal matters
  • Education
  • Long journeys

Avoid:

  • Detail work
  • Restrictions

Venus

Themes:

Love, Beauty, Art, Pleasure, Harmony

Good for:

  • Romance
  • Art
  • Social events

Avoid:

  • Conflict
  • Harsh criticism

Saturn

Themes:

Structure, Discipline, Time, Karma, Restrictions

Good for:

  • Serious work
  • Setting boundaries
  • Elder matters

Avoid:

  • New beginnings
  • Celebrations
How Planetary Hours Work

Planetary hours are an ancient system of timekeeping that divides the day into 24 unequal hours, each ruled by one of the seven classical planets. This system dates back to Hellenistic astrology and was used extensively in medieval magic and alchemy.

Day Hours

The time between sunrise and sunset is divided into 12 equal parts. These "hours" are longer in summer and shorter in winter.

Night Hours

Similarly, the time from sunset to the next sunrise is divided into 12 equal parts, creating the night hours.

Chaldean Order

Planets follow the Chaldean order based on their apparent speed: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon.

Day Rulers

Each day of the week is named after its ruling planet. The first hour after sunrise is ruled by the day's planetary ruler.

Practical Use

Choose planetary hours that align with your intentions. For example, schedule important business meetings during Jupiter's hour for success, or begin creative projects during Venus's hour for beauty and harmony.