How should I store a timestamp coming from JS on the server-side in a way that I can reliably use to convert to other timezones?

I've done this appointment thing . It gets confusing.

You should always store the timestamps on the server. The only time you need to care about the timezone is when inputting or outputting a date into/from a string by first calling date_default_timezone_set with the timezone that the date was input in (or is going to be output in).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.