Anyone Else lose January 31st Events on calander

OK, there is something weird going on.  They all show in the calendar for me, and I can see all events in teh Views module, but they won't display on custom blocks I've created.  And, one that was working for me (a Valentines Day event) disappeared after I edited it and re-saved it. 
I think there might be something funny going on with the table connections right now... Not sure what, but I'm sure Tom will be onto it as soon as he checks his email or looks at this post.
 

I have the same issue, with a couple of others related to this.
http://www.groupanizer.com/calendar-event-not-showing-1312012

I don't think that's all of it (though that might also be true), because I had an event in my list before a Valentines Day one that didn't show in certain cases, but the V-Day one did, until I saved the V-Day one again after making some changes... then that also disappeared.
The other interesting thing for me is that when I look via the Views functionality, I see everything (all events), but not when there's a calendar or display involved.  I'm wondering if there's a permissions issue somewhere that's causing us problems.

For our Jan 31 event, when I changed the time to before 19:00 the event is now in the monthly calendar; when it was 19:00 or later it did not show. It may be just coincidence that 19:00 is midnight GMT, but I doubt it. Ian did you try changing the time of your event to before midnight GMT to see if it appears? [That would be 17:00 if you are using MST]

We've been having trouble with a Calendar event we created today for June 30. The event appears when you search dates on the Attendance page. But nothing shows on the Calendar.
 
 

Mine turned out to be a weird access setting that had been reset at some stage, but hadn't been applied to existign calendar items... so my issue isn't related. 
For those events that aren't showing, can you see them when you look at the view display (via the Site Building menu option), as opposed to when you view it as a user, or is it an issue both ways?

This is pretty puzzling!  Haven't changed the calendar module lately, and since it's being used by more than 70,000 web sites all over the world, one would think others would be noticing this issue and it would get fixed.
Can't find anything current and relevant in the calendar module issues list:
http://drupal.org/project/calendar
And why would this issue apparently start happening in the past few weeks??
I'll have to mull this over but in the mean time, any workaround suggestions or found solutions would be greatly appreciated!
Tom

Mine has to be before 3pm (Alaska Time -9 GMT) to show up on the calendar.

Plot thickening.  I can create and view events in the month view on the last day of the month (Feb 29) on my test system, but not on vocalmotion's site.  So if we can track down the difference perhaps we can fix this!

I assume this isn't fixed yet, because I just noticed that our last-day-of-March performance event isn't showing. The event for me will show up when set to anything earlier than 5 PM PT. This would be 1 AM GMT (not midnight) so I'm not sure it will turn out to be a GMT-related problem, unless all the mysteries of daylight savings time are involved as well.
Tom, it's been about two months since there was progress on this, is it possible to find out if the problem has been fixed yet?