Comments on: On Friday the 13th https://alfter.us/2015/03/13/on-friday-the-13th/ Things that interest me Fri, 13 Mar 2015 23:28:31 +0000 hourly 1 https://wordpress.org/?v=6.8.5 By: Scott Alfter https://alfter.us/2015/03/13/on-friday-the-13th/#comment-14 Fri, 13 Mar 2015 23:28:31 +0000 https://alfter.us/wp/?p=3611#comment-14 The aforementioned “quick calculation?”

(for i in `seq 2016 2099`; do date -d "13 Feb $i"; date -d "13 Mar $i"; done ) | grep Fri | awk '{print $6}' | uniq -d

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