Systems and methods are provided for providing alerts to users of mobile communications networks based, at least in part, on users' real-time geospatial location at a point in time. Users and third parties set up alerts for themselves or other users that comprise alert details and trigger criteria. Alert details comprise, inter alia, text or other data defining a message to the user to whom the alert is directed. Trigger criteria comprise a geo-fenced area and dates times the alert is active. When the a user enters a geo-fenced area associated with an alert at such date and time the alert is active, the alert is transmitted to the user.