Interesting that you'd mention MyChart. The other day I was traveling in another timezone, looked at my calendar to make sure I'd make it home on time for an appointment. Sure enough, the wrong time was given. I understand that there are reasons why people would want this, like video conferencing, but there is a large population of people that could use a wysiwyg calendar. If you're telling me that the world's most powerful personal computer cannot do something this simple (import an event and convert it to absolute time) all I can do is scratch my head in wonderment.
You have a calendar that follows your "rules," apparently. I don't. Why in the world should I have to open a calculator to look at my calendar every time I cross the IDL? I'm not asking to replace your calendar, I'm asking for a feature that a lot of people want. Every couple of years I revisit the issue because it's a pita. The Apple advisor I spoke to a few days ago told me they hear about this "constantly."