Alright! Finally got back on track and was able to test this. Your explanation of the display times in the timeline clarified everything, and all is working properly now. There were a couple of things going on here that made this relatively simple issue a little tricky to track down. I thought I’d bring them up here in case someone down the line has a similar issue and stumbles onto this post…
1. The difference between the mechanisms used to display the “event creation” and “event update” times can cause some confusion. I’m not sure if there is a reason for this, but perhaps they should both be generated via the same mechanism to avoid such problems?
2. After updating the time zone for a user account, there is a significant delay (30 minutes?) before it affects the displays. If one is unaware of such a delay and is in the middle of debugging the time values, it can get a little precarious. LOL
Thank you for your help with this issue (and the several ancillary problems arising from it).