World State savings (Such as game world time, day/night state etc.)

Preserve the game world's state, including time, day/night cycles, and more, allowing for a continuous and immersive gameplay experience.

Refer SV_SaveGame and under ComprehensiveSaveData variable's WorldState used to save the meta-data related to saving the state of the game world for each level, such as time of the day etc.

WorldState field is define as a S_WorldStateSave struct type. (Content> SaveGameSystem > Data > Structs > Saves > WorldState) This struct defines has Simplified Time which is simply used to record game equivalent Hours:Minutes, and Timespan Based Time is unreal's default timespan data structure that is used to record more comprehensive time data such as Days:Hours:Minutes:Seconds:MillieSeconds. You can either one of them to record time of the day of your levels.