Cool Calendar Stuff
In honor of החדש הזה לכם:
When displaying a monthly calendar (using the non-Jewish months), a month will usually span 5 or 6 weeks, or rows in the calendar display.
Very few times will it display only 4 rows. This could only happen in February in a non-leap year, when it only has 28 days.
The pattern of year intervals when this happens is 6,11,11,6,11,11,etc.
It turns out that 2009 is one of those years.
So, here are the years that this happens on:
I thought this was interesting, but if you're asking "Who cares?", here's something that should interest you more:
Gilui's book on Birkat Hahama