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October 17, 2016 19:36
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BSD date version of how many days until Christmas :-)
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| #!/bin/sh | |
| # Today, as day-of-year (1-366) | |
| TODAY=$(date -j +"%j") | |
| # Christmas day, in d-B-y format converted to days | |
| CHRISTMAS=$(date -jf "%d-%B-%y" "25-DEC-16" +"%j") | |
| echo "There are $(($CHRISTMAS - $TODAY)) days until Christmas." |
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