How to See the Sender's Local Time in Gmail

An experimental tool has long since been retired

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Although Gmail used to support an experimental add-on to display a sender's time zone, this functionality no longer exists. You cannot see sender time zones within the Gmail web client.

Some desktop email programs will display time zones, either natively or as a plug-in. For example, offers the Sender's Time Zone plugin for Microsoft Outlook, and Outlook natively supports Gmail accounts.