Originally Posted by JulesandSand:
“'Settings' > 'Date and Time'.”
I tried that first and got nowhere, only now do I realise why.
I had to un-tick a couple of boxes at the top of the list in order for the timezone-button to highlight, thus alowing me to press it & use the international timezone-list.
I wouldn't have gone back there for a second look if you hadn't made me rethink the obvious.
So, ta!