Methods and systems for providing situational user contexts to mobile applications, allowing for delivery of the relevant content without exposing mobile users' locations and other personal data. A plurality of space-time contexts (STCs) are stored in computer memory, with each STC representing a situational environment as a function of location and time. A mobile user device is associated with at least one of the STCs based on, for example, the location of the device and the current time. The associated STCs are provided to an application interested in delivering context-specific data to the user of the mobile user device.