Automatic Date and Time not working

Admittedly this is from the iPhone User Guide, but I'm quite certain it applies to Macs as well.

"Some networks don’t support network time, so in some countries or regions, iPhone may not be able to automatically determine the local time."

Might this apply in your situation?

I should really have included the entire quote from the iPhone User Guide:

"Set Automatically: iPhone gets the correct time over the network and updates it for the time zone you’re in. Some networks don’t support network time, so in some countries or regions, iPhone may not be able to automatically determine the local time."

apthorpe wrote:

Hi

I have a Macbook Air M1 with the latest MacOS version installed (12.5.1)

When I turned it on the other day, the date was in October 2021 - if I change the clock manually and save, and then turn 'Set date and time automatically' (with time.apple.com) back on, it immediately reverts to October 2021

I tried running command

sudo sntp -sS time.apple.com

and this resulted in the time being correctly set - but if I restart or turn the automatic time off and on again, it goes back to October 2021...

Any help and advice greatly appreciated, thanks!

If that is your only issue— I would leave it as a manual setting—Do not activate the Automatic option.

If this happened to me, the first thing I would check is:

System Preferences > Date & Time > Time Zone

Is that set correctly?