Hi Len,
The programmer understands UTC time very well, yes.
After further study, the issue here is the agenda’s “time plugin” uses the web browser’s native time format. That format is in turn the time format chosen for use by your device. In this case your device appears to use the 12-hour format instead of the 24-hour format.
The easiest way to fix this is for you to change your device settings to a 24-hour format. For example my own device uses that, and the UTC time shows in 24-hour format without problems.
73
Kim OH6KZP