紫微斗數-明明觀止
True Solar Time Calculator

Enter Birth Details and Instantly Convert to True Solar Time

Pick the birth city first, then fill in the birth date and time. The system will calculate your True Solar Time immediately and show the result right below the button.

Learn How True Solar Time Is Calculated

What is True Solar Time?

True Solar Time is the time calculated based on the sun's position relative to the horizon using astronomical formulas, reflecting the actual sunlight conditions at a specific location. When the sun is positioned at the local meridian, it is 'true noon'. Unlike the artificially divided standard time, True Solar Time varies with location and date due to the Earth's rotation and revolution. It can precisely restore the local actual time based on an individual's birth coordinates.

Why True Solar Time Matters in Destiny Reading

True Solar Time is based on the actual position of the sun, whereas Mean Solar Time is an idealized uniform time convenient for daily use. Due to the Earth's rotation and revolution not being entirely uniform, a time difference occurs, known as the 'Equation of Time'. In simple terms: True Solar Time = Mean Solar Time + Equation of Time

Quick Start

Follow the 4 steps below. Once the calculation is complete, the page will automatically scroll to the result.

1

Your Birthplace

Note: If your birth city cannot be found, please search for the latitude and longitude of your city.

2

City Latitude and Longitude

If you cannot find the birth city, you can enter the birth coordinates manually.

3

Your Birthday

Note: The Zi hour is between 11 PM and 1 AM. If you select 11 PM or 12 AM (night Zi hour), it will automatically be converted to 12 AM (Zi hour) of the next day.

4

Birth Hour and Minute

Please enter the birth time in 24-hour format.

Fill in the birthplace, birth date, and birth time to start the calculation.