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Fix day number calculation taking DST into account

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Based on the SO answer http://stackoverflow.com/a/15289883/974487
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Alexandr Nikitin 2015-03-26 21:43:57 +02:00
parent 002ac8ca4c
commit 067ae77ad9
1 changed files with 4 additions and 2 deletions
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strftime.js
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@ -595,8 +595,10 @@
else else
weekday--; weekday--;
} }
var firstDayOfYear = new Date(date.getFullYear(), 0, 1),
yday = (date - firstDayOfYear) / 86400000, var firstDayOfYearUtc = Date.UTC(date.getFullYear(), 0, 1),
dateUtc = Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()),
yday = Math.floor((dateUtc - firstDayOfYearUtc) / 86400000),
weekNum = (yday + 7 - weekday) / 7; weekNum = (yday + 7 - weekday) / 7;
return Math.floor(weekNum); return Math.floor(weekNum);