How do I establish the timezone of the client?

[simon.m.shapiro]

I saved some data with the server using datime.datetime.now(). How do I display this for the user in another timezone?

[campopianoa]

This might help:

Time Zone issues

Hi folks, Anvil actually takes extreme care with Python datetime objects, because dealing with timezones is such a minefield. Here’s how it works: Any timezone-aware datetime object retains its timezone when transferred in any direction between client, server and Data Tables. Any naïve datetime object that is transferred between client and server gets automatically ‘stamped’ with the timezone of the place where it was created before it is transferred. This means that datetime objects generate…

[simon.m.shapiro]

Many thanks. Anvil continues to impress me with the things you have already thought of.

So can I conclude that a client will always show the non-DST time of their location, irrespective of how the datetime.now() was created? Can I recover the original timezone from the database entry?

For example,

What are my expectations of this code in various countries?

      self.registered_greeting.text = """
      Welcome back, %s!
      
      You last logged in on %s, after first registering on %s.
      
      Your login expires automatically on %s, unless you logout yourself.
      """ % (name, 
             user["last_logged_in"].strftime("%d/%m/%Y at %H:%M:%S"), 
             user["date_registered"].strftime("%d/%m/%Y"),
             user["token_expiry"].strftime("%d/%m/%Y at %H:%M:%S"), 
            )

Where all the dates were generated in the server.

[stefano.menci]

Does it work storing on the server in UTC and converting on the client with the following?

user["last_logged_in"].astimezone(anvil.tz.tzlocal()).strftime('%d/%m/%Y at %H:%M:%S')

[p.colbert]

I see two consecutive dots.

[simon.m.shapiro]

user[“last_logged_in”].astimezone(anvil.tz.tzlocal()).strftime(’%d/%m/%Y at %H:%M:%S’)

Works as described! Many thanks.