Zone objects have an integer property 'daylen'. This is the number of real life seconds it takes for an hour. 'fwd' is followed to get this, and you can override it on a per-room basis, etc.

You can set an offset for zones with the 'timezone' property. This should be a number between 0 and 23 to add to the hours. (default to zero).

For example, newsoton_zone's daylen is 150. This is used by all zones on Skinner, by means of 'fwd' properties. The Strm zone is set on the other side of the planet, and so its timezone is 10. So when it is 10am in New Soton, it'll be 8pm in Strm.

A special case exists for real_zone, if daylen is 0, then the time will be the time in GMT.