紫微斗數-明明觀止
True Solar Time Calculator

Birth details → true solar time

Choose birth city, then date and time. Your true solar time appears below the button.

Learn How True Solar Time Is Calculated

What is True Solar Time?

True solar time follows the sun’s real position at your birthplace—not the clock on the wall. When the sun crosses your local meridian, that’s “true noon.” It changes with date and location, so it matches the sky you were born under better than standard time alone.

Why True Solar Time Matters in Destiny Reading

Mean solar time is the even clock we use day to day. True solar time adds the equation of time—the gap caused by Earth’s orbit—so: 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

Can’t find your birth city? Look up its latitude and longitude and enter them manually.

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 runs from 11 PM to 1 AM. Choosing 11 PM or midnight for “night Zi” is treated as the next calendar day’s Zi hour (12 AM).

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.