In-game Date & Time is a plugin to enable working with a calendar/time system within your game world.
Use it to coordinate timed events in a consistent, in-game representation of time, and to drive graphical systems such as time of day or seasonal effects.
Standard calendar provided, along with support for creating custom calendars. Time can be saved and restored with a UE4 SaveGame object, game clock rate adjusted with respect to realtime, and optionally even configured to monitor passage of time while game is offline and adjust game clock accordingly on resumption.
Flexible date/time formatting options make it easy to create custom UMG widgets for displaying the time in your UI.
The plugin is network ready. Full source included.