Fixes#8514
* Convert use of local time to UTC.
* I went for some naming upgrades and consistency.
* I prefer not to post-fix types on variable names (i.e., "String" here).
* I add "UTC" here and there tho to clarify what's held in vars and the cache key.
* Opened **Distributed cache topic UE pass** #8702 to do a pass on the topic later.