An electronic Personal Information Manager (PIM) including a calendar/scheduling system with an EarthTime module is described. In operation, the system tracks different types of times: "local" time, "home" time, and "remote" time. Home time is the time zone of where the user typically spends most of...http://www.google.de/patents/US6647370?utm_source=gb-gplus-sharePatent US6647370 - System and methods for scheduling and tracking events across multiple time zones
