TimeStamp may use std::time_t

We are using a UNIX timestamp, why should we reimplement everything? Maybe we want to provide our API but why not relying on the C++ standard?

added Idea question labels

Agree that TimeStamp should not be a reimplementation.

Also, I do not think we need to redefine any API --- unless the std API is not useful for any reason.

So we have two options, removing the class (huge refactor) or reimplement the class (wraper of std).