Na, we should get rid of that idea completely. If everyone used one time like UTC (other time zones are available) and just align your working hours etc to your location.
Then 14:00 is 14:00 everywhere, just that some are asleep then, others are awake!
Webassemby is still limited to a single thread as far as I'm aware, so it's not a full runtime for the language you are writing in as anything using threads behind the scenes tends to fall over unexpectedly at runtime.
Its also an absolute bastard to debug (young ecosystem)