How do I reset the clock on a Taylor timer 5891-21?

Hit reset next to batteries to have it sync with outside temp sensor. Push mode button to scroll thru date, time. Use up and down button on back to adjust numbers.

Copy following links:
http://waterheatertimer.org/Woods-timers-and-manuals.html#FM1D
http://waterheatertimer.org/how-to-set-timers.html

Gene
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Press the Mode button until you are on the clock.
Then press and hold the Start/Stop button for 3 seconds.
There should be a beep and the digits will begin to flash.
Press the Min button to increase the Hours and press the Sec button to increase the minutes.
When you have the time set, press the Start/Stop button to finalize the setting.

Press the Mode button until you are on the clock.
Then press and hold the Start/Stop button for 3 seconds.
There should be a beep and the digits will begin to flash.
Press the Min button to increase the Hours and press the Sec button to increase the minutes.
When you have the time set, press the Start/Stop button to finalize the setting.

Here is the back of the packaging.

Press the Mode button until you are on the clock.
Then press and hold the Start/Stop button for 3 seconds.
There should be a beep and the digits will begin to flash.
Press the Min button to increase the Hours and press the Sec button to increase the minutes.
When you have the time set, press the Start/Stop button to finalize the setting.

I found the answer on a review of the product.

my Taylor 5851-21 has Hour Min Then under thatt Timer/Reset abd Start/Stop. How do I set the time. I know how to work the timer and reset the timer, but I need to set the clock. But it does not have a clock button label as you describe above.

press the Hr/+ key and the Min/- key at the same time...it will reset.

click the Hr/+ and the Min/- keys at the same time...the timer will reset.