Hello @toddedelman,
Contact Form 7 provides special mail tags to get data related to the submission. For example, it provides the special mail tag [_time] to catch the time of the submission, based on server time zone, but there is not a time zone special mail tag itself, that in any case, it would determine the time zone of the server and not of the user as such.
I think the easiest (and my recommended) way to collect this information is to add the time zones to a drop-down field and simply let the user select it. Take into consideration that many times the users use proxies or VPNs to connect to the Internet and the use of APIs to detect which country the user is connecting from often returns erroneous information.
Best regards,
Yordan.
