Google calendar won't stay as a 12-hour clock

Hello

I've had a Google calendar (embedded as a html snippet) on one site since fall 09 and it has always been 12 hours (showing 7:00 pm instead of 1900). I put a calendar on a second site last fall, same settings no problems.

About a month ago I was showing someone how to update one of the calendars ... the next day she called to ask why it showed in 24-hours. Sure enough, both of these websites now had 24-hour clocks.

It doesn't seem to matter what changes i make to the settings (and save) this stays 24 hours.

I have posted on the google discussion forum and many are having this problem. On the weekend, we were advised to check the 'location' so I changed from a city to my postal code. That worked fine ... until the next morning and now it's back at 24 hours. It appears also that many of the problems happen to Canadian websites.

Have any of you had a similar problem? and if you did, how were you able to fix it?

Thanks muchly

Elizabeth