Abstract: The present invention is directed to a travel document folder, such as an airline ticket folder, U-rail pass folder, passport holder, card case, luggage tag, key chain or the like, having a time zone conversion chart rotatably mounted to one leaf of the folder or to the card case or luggage tag. In the preferred embodiment, the time zone conversion chart is made from mounting an inner dial to an outer dial such that the two dials share a common spindle and are arranged concentrically. A time scale in units of hours is provided on the outer dial, while geographic location divisions are provided on the inner dial. Cities around the world that are located in a common time zone are then grouped and assigned to the geographic location divisions. By rotating a local city on the inner dial into alignment with a time on the outer dial, a local reference time is established.

Abstract: The present invention is directed to a travel document folder, such as an airline ticket folder, U-rail pass folder, passport holder, or the like, having a time zone conversion chart rotatably mounted to one leaf of the folder. In the preferred embodiment, the time zone conversion chart is made from mounting an inner dial to an outer dial such that the two dials share a common spindle and are arranged concentrically. A time scale in units of hours is provided on the outer dial, while geographic location divisions are provided on the inner dial. Cities around the world that are located in a common time zone are then grouped and assigned to the geographic location divisions. By rotating a local city on the inner dial into alignment with a time on the outer dial, a local reference time is established. Then by moving around the inner dial to find the desired city, it is possible to look up the local time there by reading off the outer dial the particular hour that is aligned with the desired city.