From Priscilla's original post:

> + Does the user get assigned a default timezone based on their IP  
> address?
So first, the Cosmo user would have an account and is logged in. This  
happens when the Cosmo user first selects and turns on time-zone  
support. The first item in the drop down is based on whatever their  
computer is set to, not based on the IP address. I have been informed  
that Cosmo the web client can get the time-zone from the browser  
through _javascript_–Matthew correct me if I'm wrong here.

So there are three issues here (BTW I think we are actually in agreement on this)

1) is there a way to obtain the hour offset of the user's local machine (relative to UTC) aat the time they choose to enable timezone support? YES
2) using this offset is there a way to lookup and set a "good" (at least 80% accurate) default choice for timezone in a timezone dropdown. YEs
3) creation of a timezone dropdown based on some good reference data? YES -- you have a library for this.

If the user's machine couldn't give us a timezone offset (relative to utc) we couldn't even get in the ballpark.
 
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