Kantan AutoJSON provides Blueprint nodes for converting data between UE4 types and JSON. It harnesses the UE4 property system to create mappings automatically so there is no need for direct JSON manipulation. Simply wire up any object, struct or container (array, map, set) to a single node and the plugin will map the data to, or import from, an equivalent JSON representation.

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.