The present disclosure describes systems and methods for time-based geolocation queries, with designated planned arrival and/or departure times or event start/end times. The number of queries can be drastically reduced to reduce battery, bandwidth, and processing requirements; or the rate of queries can be increased within a specified time frame, providing much higher resolution of geolocation information. Geolocation information may be monitored via notifications from portable devices to identify demographics of users within identified regions and subregions, allowing real-time, dynamic comparison of demographic information between locations, such as restaurants, clubs, or events.