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Challenge #241: Friday the 13th

PaulFound
11 - Bolide
Spoiler
PaulFound_0-1605339824497.png

Bonus: I searched 1400 to 3000 NO years didn't have a Friday 13th

WernerE
8 - Asteroid

Nice and short this week, thanks.

JasonHu
8 - Asteroid
Spoiler
workflow.png

Here is my submission!

DarekS
7 - Meteor

solved!

jamielaird
14 - Magnetar

Here's my solution:

 

Spoiler
jamielaird_0-1605471471936.png

 

SeanAdams
17 - Castor
17 - Castor

I did it slightly differently to others and checked to see if there were any gap years.

 

Spoiler

The top summary only counts the in-scope; the bottom counts all years so this way the join will take care of any missing years (of which there were NONE)
Solution.png

p-g
8 - Asteroid

My solution!!!

 

Spoiler
I used Append tool to generate all dates from 1900 to 2020. It was pretty straightforward from this point forward. Answer to Bonus question - No. Every year has at least 1 or at most 3 Friday the 13th in each calendar year.

challenge_241_solution_p-g.png

 

kmedici
8 - Asteroid

Solution attached

aruiz-itp
11 - Bolide

here my solution

hanykowska
10 - Fireball

a very pleasant challenge

 

some findings in the spoiler:

Spoiler
there have been 209 Friday the 13th since 1900-01-01
and on average, there's 1.7 of those every year
there has not been a year without a Friday the 13th

my workflow (without additional questions from the spoiler above):

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hanykowska_0-1605548044786.png