So, some time ago, I posted this, on an error I encountered in a subscribed calendar, from Google Calendar, in GPE Calendar:

This error made it impossible for me to use GPE to view my calendar (without using Erminig, which, because I'd lost data in the past, I was a little reluctant to do).

I've figured out how to fix this -- so if it happens to you, try this. I downloaded the .ics for my calendar from Google Calendar. I ran this command on it: "grep CREATED basic.ics >> joncreated.txt". I took the resulting list of "CREATED" lines, put them in a spreadsheet, and sorted them alphabetically.

Lo and behold, the top of the spreadsheet showed this oddity: CREATED:00001231T000000Z
it found four instances. Obviously all of the zeroes and 1234 don't represent a valid date, the way the other CREATED entries did.

So, I opened my ics file (basic.ics) in a text editor and searched for every instance of CREATED:00001231T000000Z. I looked for the event name, and then deleted and remade that event in Google Calendar.

Now it works perfectly as a subscribed calendar in GPE Calendar!

Best,
Jon