A time zone is an area where everyone uses the same standard time. Time zones exist because different parts of Earth face the Sun at different times as the planet rotates. When you travel east or west and cross a time zone boundary, you typically need to adjust your clock by one hour.
Examples for Time Zones: Central European Time (CET) or Eastern Standard Time Zone (EST)
When you're running Free Tours in different Time Zones, times in your Dashboard reflects the times of where you are.
This allows you to see when your Tours are happening in your local Time Zone.
Example: your Tours in Central Europe start at 4:00 PM. On Holidays in New York those Tours would now appear at 10:00 AM.
This doesnt need to worry you if you are in the same Time Zone as the Tour you're modifying. If you are in another Time Zone, for example when traveling, the time where you currently are is applied.