ASUS RT-AC56U, locale not consistent with TimeZone

[Zeebzog]

I bought my router in the UK and then moved to the UAE. I have set the TimeZone and now get this warning. I have found on the forum how to change the locale but have some quick questions:

1. Where do I find the available locale codes?
2. Is this an issue? I am trying to use the Router VPN Client back to the UK and it is not working, could this be part of the problem?
3. Does the local changes persist between reboots?

Thank you!