Six and eleven

Oftentimes when you see the word “and” between two numbers, you think of a plus sign. Well, obviously then the answer is seventeen.

Cue the Humbug yelling a wrong answer, or preparing to eat six more bowls of FAMINE.

It’s not coincidental that the year is two thousand and seventeen, because today’s date is also significant, from seventeen years ago.

In previous years, I have written about this magical-to-me date of עשרים ואחת ביולי. I wrote posts about it in 2011, 2012, 2013, 2014, and 2016 (don’t ask me why 2015 was a singularity).

However, let me explain the reason for this post! There have only been two Friday, July 21, since the year 2000. After the year 2000 (when I became a bar mitzvah), it was 6 years before we got another Friday, July 21, in 2006. Actually, the 2012 post mentions something about the 2006 holiday.

It would ordinarily be 6 years before the next Friday, July 21, meaning 2012. Except for the fact that the ^&%*# leap year messes it up and moved the twenty-first to a Saturday on that year.

Thus, today is the first Friday, July 21 since 2006, and will be the last one until 2023.

And in general, the tuple (Xday, MONTH, NUMBER) re-appears either every six or eleven years, depending on whether it’s skipped in the leap year.

I’m just finishing up with work and getting ready to celebrate עשרים ואחת ביולי in Chicago, with Shabbat On The Lake-Not-On-The-Lake-Due-To-Weather.

Shabbat shalom and have a great weekend!


MathFest: 5 days

Nebraska Regional: 16 days

Semester Kickoff: 47 days

blog signature


Let's have a conversation!

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s