u/Lichtblitz

As a software dev myself: if time in your application's internals jumps on DST, something has been implemented incorrectly. That's what zone information is for, to make times uniquely identifiable and timers run the correct length.

Getting the implementation right is hard, though. So, abolishing DST is very well worth it.

In short: it's not the letter, it's the first sound that dictates "a" vs "an".

Example:

a uniform

an underling