Operations can be planned and posted in the operation planner. Dedicated fields for start/end date and time, location, url make operations easy to create and read. Furthermore, the organiser can specify which Doctrine(s) should be used during the operation. Users can accept/decluine and the schedule can be synced to external calendars (Google, iPhone, Android etc).
Fleet-Up supports a POS/structure timer system, which allows users to post reinforcement timers that will display the end point in local time. You can also specify solar system, planet, moon, etc.