Using historical location data to improve estimates of location

A data processing method comprising:

• using a server computer, obtaining from one or more non-transitory computer-readable data storage media a copy of one or more sequences of instructions that are stored on the media and which when executed using a particular user computer among a plurality of user computers cause the particular user computer to perform:
• using the particular user computer alone or in combination with the server computer, obtaining, from a calendar database associated with a particular mobile computing device, an event record specifying an event, and a date value and a time value indicating a date and time of the event;
• obtaining, from a user location history table accessible to a server computer, historical location data specifying a plurality of past geographical locations of the particular mobile computing device;
• using the server computer, determining, based upon the plurality of past geographical locations of the particular mobile computing device, a predicted location of the event;
• based upon the predicted location of the event, a current location of the particular mobile computing device, and mode data specifying a particular mode of transportation, calculating a route of travel between the current location and the predicted location and an estimated duration of travel;
• determining, based upon the date value, time value, route of travel and estimated duration of travel, a recommended time to leave to arrive at the predicted location of the event approximately on time;
• using the server computer, downloading the copy of the one or more sequences of instructions to any user computer among the plurality of user computers.

A computer system comprising:

• a server computer comprising one or more non-transitory computer-readable data storage media stored with one or more sequences of instructions which when executed using a particular user computer among a plurality of user computers cause the particular user computer to perform:
• using the particular user computer, alone or in combination with the server computer, obtaining, from a calendar database associated with a particular mobile computing device, an event record specifying an event, and a date value and a time value indicating a date and time of the event;
• obtaining, from a user location history table accessible to a server computer, historical location data specifying a plurality of past geographical locations of the particular mobile computing device;
• using the server computer, determining, based upon the plurality of past geographical locations of the particular mobile computing device, a predicted location of the event;
• based upon the predicted location of the event, a current location of the particular mobile computing device, and mode data specifying a particular mode of transportation, calculating a route of travel between the current location and the predicted location and an estimated duration of travel;
• determining, based upon the date value, time value, route of travel and estimated duration of travel, a recommended time to leave to arrive at the predicted location of the event approximately on time;
• in the server computer, stored downloading instructions which, when executed using the server computer, cause downloading a plurality of copies of the one or more sequences of instructions to the plurality of user computers.