Tiffany N. KeysŐ Essay 1:
Friday
the Thirteenth
For
Investigation A, I prepared a spreadsheet in
Microsoft Excel in order to show that for any year there must be at least one
month and at most three months for which the 13th of the month falls
on Friday. I showed this given any
day that January 1st could possibly fall on. The month in which the
13th falls on a Friday has been highlighted.
Click
here to view the spreadsheet for Investigation A
In
order to make comparisons between leap years and non-leap years in Investigation B, I prepared two spreadsheets in
Excel in order to show which months have Friday the 13th in
them. Like Investigation A, I
showed this for any given day in which January 1st could fall on in
non-leap years and leap years.
1.
I
researched that January 1st occurred on a Thursday therefore
resulting in a Friday the 13th in both February and March. From the spreadsheet I prepared, I can
confirm that Thursday is the only day in which January 1st could
fall in a non-leap and leap year in which results in two consecutive Friday the
13th in February and March.
2.
The
next year in which there will be two consecutive Friday the 13th in
February and March will be in 2009.
Since January 1, 2009 will occur on Thursday, my spreadsheet confirms
this.
3.
I
do not think that there is a pattern or cycle for which I can determine which
years between 2000 and 2100 there will be two consecutive Friday the 13th
in February and March because the day in which the first day of the year occurs
appears to be the determining factor for this event. There probably is a pattern or cycle for which one can
determine what day January 1st will fall on.
Click
here to view the spreadsheet for Investigation B