Hi Charles,
I got another chance to look at this, and got a bit further. Just as a completely random thought, I looked at the Configuration page, changed nothing, and did a Save. Remarkably, the calendar started working.

I actually got a couple events to work, and even display (...applause...)
I thought I’d push my luck by trying the Ajax thing. I eventually realized that I needed to change settings in the Config. I set it to load the Google Ajax library. Tested it, no Ajax - just the blank Ajax page.
I realized that the library autoload did not work. I hard-coded the include to the Google library in my template. OMG, I got an Ajax page to come up!?! But completely blank.
Then I thought, well, the Ajax page has "nothing" in it, maybe try the snippet call there. I’m stunned to see that the non-parmed snippet call actually made the event code appear.
Clearly my psychic faculties are working today. Whoa, at this rate, maybe I can get templates working (oh, I shouldn’t have said that, now I’ve put a hex on myself).
PS: Maybe it’s on someone’s list somewhere, but I was hoping to be able to set the 24 hour time off for data entry. I tried that in the config, but still have 24 hour time.