The whole business of moving clocks forward and back is fraught with complications. Normally times differ east-west, and the steps are an hour, but in some cases it changes north-south, sometimes by half an hour and in Nepal, for example, it has a 45 minute offset. as an example of a North-South change, the EU is talking about stopping moving the clocks around whereas Northern Ireland would presumably follow the UK. So half the year it would be aligned with the Republic and half not.

Then three letter acronyms are not standardised. Most people in the UK assume BST means British Summer Time, whereas it also means Bangladesh Standard Time. EST means different thing to US citizens to Australian ones.

It is all a bit of a mess, to be honest.