The values in the red box you can modify, if needed - values in other boxes are then calculated.
Be especially careful with your time zone and daylight save - automatic detection can easily fail depending on your computer settings and country.
Verify the correct UTC offset in the green box!
You can conveniently go forward and backward in time with the buttons, a month, day or hour for each click.
If your computer has GPS or other means of location awareness you can press the "Get from GPS" button to automatically update your
longitude and latitude. Unfortunately newer web browsers will not allow your location to be used here as my web host does not provide
secure connection (https) at the moment.
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