I just got invited to a meeting for a time zone that doesn’t exist this time of year. In the US EST does not stand for Eastern time, it stands for Eastern Standard Time (~November-~March), EST is not an active time zone, it is EDT Eastern Daylight Time. Its a pointless thing, most people probably don’t notice, but its wrong.
Fake internet points to anyone who knows why DB-9 bothers me.
Edit: corrected a missing n in an eastern
The important thing is the time gets communicated, and in the US outside states that don’t observe daylight saving time, I just assume the vernacular time for that zone.