Birth Profile

The birth profile is stored only in a necessary cookie in this browser. No account or login is required.

Birth date

Day

Month

Year

Birth time (ordinary local time at the place of birth)

Enter the ordinary civil time valid at the place of birth. The application converts it to UTC from the selected time zone, including daylight saving time where applicable.

Place of birth Coordinates from map

Google Maps copies coordinates as latitude, longitude. The button below splits them into the fields.

Open Google Maps

The button asks the browser for location permission and fills in coordinates only. Use it mainly when you are at the birthplace.

Latitude

Longitude

Time zone

Enter the time zone of the birthplace, not a manual +1/+2 offset. It lets the system convert ordinary local birth time to UTC and handle historical summer or standard time for that date.

How do I choose the time zone?

For births in Czechia, Europe/Prague is usually correct. Slovakia uses Europe/Bratislava, Austria Europe/Vienna, Germany Europe/Berlin, and the United Kingdom Europe/London. If you only know the country or city, choose the nearest region with the same time rules.

Saved Profiles and Link

For work with several people, save profiles only in this browser or create a bookmark link. Calculations still use one currently active profile.

Profile name

Link to this profile

The link stores the data after the # sign, so it is normally not sent to the server or Apache logs. Whoever opens the link sets this as the active profile in their browser.