Planetary Hour Calculator

Planetary Hour Calculator MCP Connector for Claude

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Calculate the 24 planetary hours of a day and their ruling planets based on Chaldean tradition.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

The Planetary Hour Calculator allows you to determine the exact timing and governing celestial body for each of the twenty-four planetary hours in a day. Based on ancient Chaldean astrology, it divides the daylight period (sunrise to sunset) and the nighttime period (sunset to next sunrise) into twelve equal segments each. Using tools like get_planetary_schedule, you can retrieve a full schedule including start times, end times, and the ruling planet for every hour. You can also use calculate_segment_durations to find the specific length of daytime and nighttime hours, or get_day_planet_affinity to identify which planet rules the first hour of a specific weekday.

astrologychaldeanplanetary-hoursastronomical-timeschedule-generator

3 tools expose this connector's capabilities to your AI agent.

get_day_planet_affinity

Identify the primary ruler for the start of a specific weekday

get_planetary_schedule

Generate a complete list of all twenty-four planetary hours for a specific day

calculate_segment_durations

Determine the length of a single daylight and nighttime planetary hour

See how to talk to your AI agent using Planetary Hour Calculator.

What is the planetary schedule for today if sunrise is 06:00, sunset is 18:00, and next day sunrise is 06:00 on a Monday?

The first hour starts at 06:00 with Moon. The daylight hours continue until 18:00, followed by nighttime hours starting at 18:00 and ending at 06:00 the next day.

How long is a single daytime planetary hour if sunrise is 05:30 and sunset is 19:30?

A single daytime planetary hour lasts 80 minutes.

Which planet rules the first hour of a Friday?

The planet ruling the first hour of Friday is Venus.

The daylight period from sunrise to sunset is divided into twelve equal segments, and the nighttime period from sunset to the next day's sunrise is also divided into twelve equal segments.

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