Time Zone

The time zone of a location on Earth is the difference between Universal Time (UT) and local time, in hours. For most locations, this equals your longitude divided by 15 degrees. Regional variations can cause the time zone to differ by plus or minus one hour.

TheSky6 uses a convention where Eastern longitudes have a positive time zone value between 1 and 12, and Western longitudes have a negative time zone between -1 and -12. TheSky6 determines the sign of the time zone using the East or West Longitude setting on the Location dialog box.

Some non-standard time zone locations do not follow this convention. An example of a non-standard time zone is one that is West of the Prime Meridian, but ahead of universal time (UT), as is the case in parts of France and Spain.

If you live in a non-standard time zone, you must mark the Allow Non-Standard Time Zone option on the Time Options dialog box so that TheSky6 computes the non-standard time zone, and therefore the correct local time.