Parts of Portugal are so far west that there’s a reasonable case for it not being on London time but another time zone over – the Azores one. OK, not all that strong a case, being two hours out from Spain would be odd etc.
However, using one of the major appointment reminder services (no names, no packdrill, but from a company that provides both search and email) you end up getting reminded of appointments on Azores time, not Portuguese. Some investigation (a bloke who used to drink in the same pub now works at HQ) and I find out that this time zone allocation is not in fact from that major company. It’s a step – at least – further back into the system. Some significant part of the world now has this error coded into it.
It’s not there yet but there could actually come a time when it would be sensible for Portugal to move to Azores time rather than trying to fix the coding.