@PhotoSawyer 

I am having the same issue.  Looks like no one has responded yet.  My system has been working perfect for 7-8 months and then went down tonight, had to delete and add new network and now my time controls think it is a different time zone.

@PhotoSawyer 

The time zone of the Deco is set upon configuring the Deco system which is taken from the phone. Delete the Deco network, reset the Deco units and configure the system again, it should get the correct time settings from the phone.

@Tony Please consider adding a better way to remedy this to the Deco's software and app. This is going to be quite painful and take hours! I've got about 30 devices registered on my network and six different profiles. Many devices are for family members who only visit periodically. I've manually set the name on over half the devices so I don't have half-a-dozen "android-[guid]" named devices and, instead, have a name that actually identifies what they are.

Since the time zone shifted on it's own, is there any risk it might shift back own it's own in the future. Or shift again once I fix it?

An export of the Deco's settings and configuration with an import process would be pretty handy. Better yet, allow us to simply fix the clock!

@PhotoSawyer 

could not agree more!  Here is a link that might help.  I got this morning on an online chat with CS.  https://www.tp-link.com/us/support/faq/2644/?utm_medium=select-local

@ANielsen Yep, same for me. Changing the Continent and Region is not changing the Current Time in the System Time screen. My local Region is also Denver, but the time being shown is +6 hours (UTC/Greenwich). Setting the Continent to "Europe" and the Region to "London," the time still shows the same +6 hours from Denver. The following snip with taken at 2020-03-21 9:25:50 PM, Mountain Daylight Time.

Change to Lodon, save, wait for success, and reload the page, and still same time:

Definitely something wrong with system.

@PhotoSawyer Hi.  I'm having the same issue so I also posted something here in the community.  I thought I had a work-around for this.  Last night, it looked like my Deco thought it was four hours later than it really was so I change my bedtime setting to kick in four hour later.  Not ideal, but I expected it to work.  Nope.  I Logged into the M5 this morning and now it thinks it is 16 hours later.  At 9:00 AM local time here in FL, the M5 thought the the time was almost 1:00 *AM* not 1:00 *PM* like it was doing last night.  Very infuriating.  So, apologies, I don't have a solution - I'm just commiserating.

@PhotoSawyer Pretty rediculous that Deco doesn't know what time it is. But, it's definitely messed up.

For those that are able to, have the Deco units been reset to see if the time settings are then correct?

@Tony  Yes, i have reset my Deco's and it did not change anything.