@Admtigu @blkjak 

What about now? If you are still suffering the issue that your Deco is using the wrong time, please log in to your Deco’s web UI and click Advanced>System>Time Setting and have a check about whether your Deco is showing the right time.

Note: how to log in to the web UI of your Deco: https://www.tp-link.com/support/faq/2641/

If you find that it is several hours ahead of the real-time, please change the “Region” to another place and after it takes effect please change it back to your real region. This could speed up refreshing the time.

Please contact us if you have any further concerns!