We look at the calendars for 2015 and 2016
2015 is a non-leap year and 2016 is a leap year.
in in
2015 2016
This was/will be will be
date on on
-------------------------------------------
Jan 13 Tu We
Feb 13 Fr Sa
Mar 13 Fr Su
Apr 13 Mo We
May 13 We Fr
Jun 13 Sa Mo
Jul 13 Mo We
Aug 13 Th Sa
Sep 13 Su Tu
Oct 13 Tu Th
Nov 13 Fr Su
Dec 13 Su Tu
It's interesting there are 3 Friday 13's in 2015,
but there will be only 1 Friday the 13th in 2016.
In 2015, the 13th was or will be on the same day of
the week in the months:
Jan & Oct.
Feb, Mar, & Nov,
Apr & Jul
Sep & Dec
In 2016, the 13th will be on the same day of
the week in the months:
Jan, Apr, & Jul
Feb & Aug
Mar & Nov
Sep & Dec
So when Feb 13 is on Friday in a non-leap year (as it was
in 2015), or Jan 13 is on Friday in a leap year, there will
be 3 Friday 13ths that year. Otherwise there will only be 2
or just 1 (as will be the case next year in 2016).
Edwin
