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+tzupdate
+
+tzupdate is a fully automated utility to set the system time using
+geolocation.
+
+Internally, this geolocates you, gets the timezone for that geolocation,
+and then updates the system's local time zone.
+
+You can see what tzupdate would do without actually doing it by passing
+-p, and specify an alternative IP address by using -i. This is not an
+exhaustive list of options, see tzupdate --help for that.
+
+NOTE: Do not trust its results blindly. It does what it can, but
+determining a time zone based on an IP is inherently unreliable.