I agree that it's an important difference, but being insistent about it is excessive because functionally those kind of mistakes just don't happen when scheduli

I agree that it's an important difference, but being insistent about it is excessive because functionally those kind of mistakes just don't happen when scheduling meetings in Outlook, which is the context where it matters. Most of my work meetings only involve people in the same city, so there's no confusion there, and thus no scheduling problems. And 99% of the rest of my meetings are with people in Europe, and the relative difference between PST and CET is the same as the relative difference between PDT and CEST (though I do have to remind people twice a year that the two time zones change to/from DST a week or two apart).