Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 764)

Date/Time/Zone
When you turn on the power for the first time or if the date/time/zone have been reset, follow
these steps to set the time zone first.
By setting the time zone first, you can simply adjust this setting as needed in the future and
the date/time will be updated to match it.
Since the captured images will be appended with the shooting date and time information, be
sure to set your date/time.
1.
Select [ : Date/Time/Zone].
2.
Set the time zone.
Turn the < > dial to select [ Time zone ].
Press < >.
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