Calendar management devices and systems are disclosed that are configured with hardware to generate a calendar object and a calendar share identifier associated with the calendar object, and to cause the calendar share identifier to be provided to each of a plurality of calendar users. User input is received indicating a new event associated with the calendar object, and in response to the user input, the device(s) are configured to determine an authorization level of the new event based on the user input, generate a calendar event object comprising the authorization level, and automatically send a publication request to a remote server over a network, wherein said sending the publication request directs the remote server to determine a subset of the plurality of calendar users based on the authorization level and to send the event object to each of the subset of the plurality of calendar users. Media data indicative of one or more media items associated with the new event is received and associated with the event object.