Planetary Hours
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Planetary Hours
Location-aware • Seasonal hours • Clear & fast
Calculate planetary hours for any city, time zone, and date — based on local sunrise/sunset, with clear day & night hours.
Planetary hours are a traditional timing system used in astrology and ritual practice. They divide day and night into 24 seasonal hours (12 by day, 12 by night).
Each hour is ruled by a planet. The rulership follows the Chaldean order and starts from the planet that rules the weekday.
Choose a location (city or coordinates) and a date. We compute sunrise and sunset for that place, accounting for local timezone and daylight saving time.
Daytime is split into 12 seasonal hours from sunrise to sunset; night is split into 12 seasonal hours from sunset to sunrise. Hour lengths change with the season.
Each hour is ruled by a planet in Chaldean order. The first hour of each day starts with the planet that rules that weekday (e.g., Sun on Sunday, Moon on Monday).
After you open the main app, you can explore extra layers (Moon data, houses, search filters, election-style windows) without cluttering this landing page.
Open the calculator →Planetary hours are a timing layer. You can use them to align actions with traditional planetary qualities — like choosing a Venus hour for relationships or art, or a Mercury hour for study and deals.
Pick a Venus hour for meetings, art, beauty, reconciliation, and social harmony. Great for actions that need attraction and ease.
Use Mercury hours for writing, study, interviews, commerce, tech work, and travel logistics. Ideal for fast iteration and clear messaging.
Mars hours can support courage, competition, workouts, and cutting through obstacles. Best used with a clear plan (and not for impulsive drama).
Don’t use hours in isolation. Strong timing usually combines planetary hour + Moon condition + aspects + house strength. The Election tab helps you scan for stronger windows.
Use this as a quick guide when you’re choosing a planet for an action window. Always confirm the chart context (Moon, aspects, and house condition).
| Planet | Keywords | Good for |
|---|---|---|
| ☉ Sun | Vitality, clarity, confidence | Leadership, visibility, important decisions |
| ☾ Moon | Emotions, body, rhythm | Home, care, intuition, daily routines |
| ☿ Mercury | Communication, trade, learning | Messaging, deals, study, travel |
| ♀ Venus | Attraction, pleasure, connection | Love, art, harmony, money flow |
| ♂ Mars | Action, force, drive | Courage, competition, cutting ties |
| ♃ Jupiter | Expansion, luck, teaching | Growth, opportunity, long-term gains |
| ♄ Saturn | Structure, limits, time | Discipline, boundaries, endings |
Planetary hours divide the day and night into 24 unequal seasonal hours. Each hour is ruled by a planet in Chaldean order, starting from the planet that rules the weekday.
No. Planetary hours depend on local sunrise and sunset. The exact start/end times change by city, season, and daylight saving time.
Traditional systems use Chaldean order: Saturn → Jupiter → Mars → Sun → Venus → Mercury → Moon, repeating. The first hour of each day starts with the weekday’s ruler.
Yes. Many practitioners choose hours that match the goal (e.g., Venus for love/art, Mercury for learning/commerce). Strong charts also consider Moon condition, aspects, and house placement.
The calculator shows today’s planetary hours, plus advanced Moon data and Placidus houses. The Election tab finds strong time windows for a chosen intention.
Seasonal hours are unequal: daytime is split into 12 parts from sunrise to sunset, and night into 12 parts from sunset to sunrise. Hours are longer in summer days and shorter in winter days.
Use your city/timezone for convenience. For maximum precision (especially near borders or unusual DST rules), you can enter coordinates.
Yes. The app is built to be fast and mobile-friendly, with caching and minimal UI friction.