The invention relates to a method for tracking time using a mobile computing device. The method steps include providing a first event manager on the mobile computing device for managing event records, wherein each event record is synchronized via an exchange server to a corresponding event record managed by a second event manager on a client machine, generating a time tracking record based on input from a user of the mobile computing device, wherein the time tracking record is added to the event records as a surrogate event record, transmitting the surrogate event record via the exchange server to the second event manager operatively coupled to a client application on the client machine, extracting time entry information from the surrogate event record using the client application for tracking time, and generating estimated time entry information automatically based on the event record.