Have access to the client time zone or client datetime

By Maria da Graça Peixoto on 29 Jun
It would be nice to have access to the client time zone or client datetime from the server side. When it's needed from the first screen shown implies some work in Javascript and hide an input field to pass the information to the server in a stealthy way is not exactly "straight forwards" 
I like the idea, just not sure how to implement it on the first page load of a session.

J.Ja