1 Press TITLE repeatedly until the time is displayed.
2 Press and hold TITLE for at least 2 seconds while the time is displayed. The time indication will blink.
3 Turn the Rotary encoder to adjust the hours while the time indication is blinking.
4 When the hour has been adjusted, press MODE.
5 Turn the Rotary encoder to adjust the minutes while the time indication is blinking. The time is automatically set 5 seconds after the minute adjustment. The time can also be manually set by pressing TITLE.
This is from page 7 of the user's manual, available here
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