Abstract: Systems, methods, and computer media for processing time activities are provided herein. Time activities, each having a type and a timestamp, can be received. Based on the types and timestamps, a time activity pair can be formed, and a time interval can be generated corresponding to the time activity pair. Time intervals can have a classification. Activity for a time period can thus be determined through pair formation and time interval generation using the time activities received during the time period. A time tracking application account can be updated to include the generated time intervals.