Long year: Difference between revisions
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→Straightforward check using GNU date(1)
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=== Straightforward check using GNU date(1) ===
December 28th is always in the last week of the year, so just check whether or not that's week 53:
<lang sh>long_year() {
expr $(date -d "$1-12-28" +%V) = 53 >/dev/null
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