Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier and to hear of any issue with this unit.
To help you with this issue, I have a link to the manual for this unit below - in electronic (PDF) form. The manual should appear on your screen when you click the link.
The steps for setting the time, date, etc. START on page 3 of that manual.
Click here --> https://www.lacrossetechnology.com/media/catalog/product/w/8/w85746.pdf
NOTE: If the manual does NOT display, you may need to install a PDF "viewer" program on your system. I have a link to a no cost viewer program - if you need it.
Click here --> https://get.adobe.com/reader/
I hope this helps. Please let me know what you find or if you have any more questions.
If this has answered your question(s), please take a moment to rate MY service level (5-star is my goal) so that I get credit for my time helping you with this question.
You should see some "stars" (and SUBMIT button) to do that, but please let me know if you do NOT see them (you may have to REFRESH your screen) or can not use them.
Thanks, ***** *****