Sun hour
Expression & purposeThe Sun is associated with visibility, confidence and a sense of purpose. Use the time as a prompt to work on something you want to put your name to.
Free planetary timing tool
Planetary Hours Calculator
Find today's planetary hours for your city, from sunrise to the next sunrise. Choose a planet, see its hours and save them to your calendar.
Local time zones · Day & night hours · No account neededA day measured by the Sun24 hours.
24 hours.
A different rhythm.
Twelve hours of daylight. Twelve hours of night. Each follows the Sun, so a summer day hour lasts longer than a winter one.
Local sunrise & sunset Seven traditional rulers A calendar you can keep
How the calculation works A planetary hour is one twelfth of daylight or one twelfth of the night. We calculate sunrise and sunset for your coordinates, divide each interval into twelve equal parts, then assign a ruler to every part.
The first hour belongs to the weekday's ruler. After that, the sequence repeats in the Chaldean order shown below, continuing through the night.
SaturnJupiterMarsSunVenusMercuryMoon
For example, if sunrise is 06:00 and sunset is 18:00, each daylight hour lasts 60 minutes. If sunrise is 05:00 and sunset is 20:00, each lasts 75 minutes. These are illustrations; your result uses the Sun's calculated rise and set times.
Times assume sea level and an unobstructed horizon. Weather, elevation and nearby mountains can change observed sunrise. Planetary meanings are astrology traditions for reflection.
The first hour at sunrise
Planetary days of the week
The day ruler starts the sequence. Every day still includes hours of all seven planets.
SundaySun
MondayMoon
TuesdayMars
WednesdayMercury
ThursdayJupiter
FridayVenus
SaturdaySaturn
An invitation to pause
What each planetary hour means
These themes offer prompts for how to spend your attention. They do not predict what will happen.
Moon hour
Care & reflectionThe Moon is associated with feelings, home and familiar routines. You might set aside time to check in with yourself or someone you care about.
Mars hour
Action & courageMars is associated with effort, initiative and boundaries. A practical use is to begin a task you have been putting off, with a clear stopping point.
Mercury hour
Words & learningMercury is associated with communication, study and exchange. It can be a reminder to write, learn something or give a conversation your attention.
Jupiter hour
Learning & generosityJupiter is associated with perspective, growth and generosity. You might make room for a longer view or share what you know with someone else.
Venus hour
Connection & creativityVenus is associated with affection, pleasure and beauty. Use a Venus hour as a reminder to make art, enjoy something lovely or spend unhurried time with a partner.
Saturn hour
Structure & patienceSaturn is associated with responsibility, limits and sustained effort. It can be a useful prompt to organize your time or finish a practical task.
Using the calculatorQuestions about
Questions about
planetary hours?
Start with your location. The Sun sets the pace.
What are planetary hours?
Planetary hours are a traditional astrology system that assigns a planetary ruler to each part of the day. Daylight is divided into 12 equal parts, and the night into another 12. Their lengths change with the season and your location, so they usually differ from 60-minute clock hours.
How do I find today's planetary hours?
Choose the city where you will be, leave the date blank and select Calculate planetary hours. The calculator opens the planetary day happening now in that city. Before sunrise, that day began on the previous calendar date. You can also choose a date to plan ahead.
What is the order of the planetary hours?
The repeating Chaldean order is Saturn, Jupiter, Mars, Sun, Venus, Mercury and Moon. The first hour at sunrise belongs to the ruler of the weekday. The sequence then continues through all 12 daylight hours and all 12 night hours.
When is Venus hour today?
Calculate the hours for your city, then choose Venus in the planet filter. The table shows each Venus hour in that planetary day, including the hours after sunset. Venus traditionally represents affection, beauty and creativity. The time changes daily and is not the same in every city.
Do planetary hours start at midnight?
No. A planetary day starts at local sunrise and ends at the following sunrise. The early hours after midnight still belong to the planetary day that began the previous morning. Night hours continue the same planetary sequence without restarting at midnight.
Does the calculator handle daylight saving time?
Yes. It divides the actual elapsed time between sunrise and sunset, and between sunset and the next sunrise. It then displays each boundary in the selected city's time zone. UTC offsets appear beside the times so a repeated or skipped clock hour is clear.
Why are there no planetary hours for some dates near the poles?
The traditional calculation requires a complete sunrise, sunset and following sunrise. During polar day, polar night or a transition without a complete daily cycle, that division is unavailable. The calculator explains this instead of filling the table with invented times.
Do I need my birth time or an account?
No. You only need a location and, optionally, a date. The calculator is free and runs in your browser. City searches, coordinates and selected dates are not sent to a calculation service or saved in your browser by this tool.
Can I save planetary hours to my calendar?
Yes. After calculating, choose a planet or keep All planets, then select Download calendar. The resulting ICS file contains the visible hours with exact start and end times. Import the file into your calendar app. Calendar apps display events in their own selected time zone.
Method references: Astrodienst on planetary hours, Time Nomad on planetary days and Astronomy Engine. Sunrise and sunset samples independently checked with Swiss Ephemeris.