The huge continent on which most campaigns reside. We have Maps.
Culturally, Kara-Tur is divided somewhat like medieval Eurasia, with roughly:
- Western European cultures in the northwest, (e.g., Drannor & Durkin)
- Mediterranean (greek/roman) in the southwest, (e.g., Talathese)
- Middle Eastern in the south central, (e.g., Ra)
- Indian/Indonesian in the southeast, (e.g., Sri, Kali-Shaza
- Asian in the east and northeast (e.g., Kozu)
- Mongolian in the sparsely inhabited south-central region (e.g., Zitijan Steppe)
An age of continental exploration began in the early 900s and resulted in Spice Road.
Gurth is conveniently astronomically identical to Earth -- month names, lunar cycles, seasons, etc. The whole of the continent is in the northern hemisphere, though its southern reaches are nearly equatorial.
An as-yet-undefined event caused the counting of years to begin about a thousand years ago.
For example, campaign references to '06 means the year 1006. This also serves as a point of reference to our real-life play sessions by adding 1000 years. So, (unless otherwise defined), campaign events that took place in Gurth's '03 means we probably played that campaign in 2003.