Client-side and server-side methods for displaying event data within a map that is displayed on a computing device are presented. In an example, the method includes receiving a request for mapping data including a request location defining a current geographic location of the client computing device, determining a request time corresponding to the request, the request time based on a time the mapping data request was sent by the client computing device. The method also includes retrieving mapping data corresponding to the request location and determining that an event in an event database includes an event time that occurs within a threshold time of the request time. The method further includes retrieving event data corresponding to the event that occurs within the threshold time of the request time and sending the retrieved mapping data and the retrieved event data to the client computing device in response to the request.