First day of week iso standard

To better understand just how this function works it might be best to look at some of the rules applied by both week numbering standards. In other countries, especially in Europe, the beginning of the week starts on Monday. In most European countries the week numbering is based on the ISO standard which also applies the first day of the week to Monday.

Although this difference seems to set the two standards clearly apart, the differences in week numbering between the American and European systems are more likely to appear when week numbers fall across the end or beginning of a year. The ISO week numbering standard are based on these rules:. Example For an ISO week, if the last day of the year ends on a Wednesday as it did in , the week is considered to include the first few days of the next year to complete the full seven day week.

Thereby it continues to count the week numbering from the current year until the week is complete. This could make the last week of the year be week 52 or 53 in some cases. In for instance, applying the ISO standard that Monday is the first day of the week, the first week of began on the first Monday, January 4, January 1 through 3, , fell within week 53 of because they were on Friday, Saturday and Sunday, respectively.

This example of a year containing 53 weeks will next occur again at the end of the year Following the American standard, these rules apply:. Last updated on February 22, Esther Visser. Resting in God Resting in God is central to the life of a Christian — at least is should be. Share post. Share on facebook. Share on twitter. Share on telegram. Share on whatsapp. Share on email. Click here to enroll. A Daily Devotional in Your Inbox.

Both Saturdays and Sundays are common days of rest in the calendar. Calendars in some countries use a separate color for the weekends and reserve the black or gray fonts for the weekdays, Monday through Friday. A common year roughly adds up to 52 weeks of 7 days each plus 1 day — or 2 days, if it's a leap year.

However, countries vary on exactly how they present and number the weeks in their calendars. Week Number Calculator. The weeks of the year in a Gregorian calendar are numbered from week 1 to week 52 or If a year, and week 1, starts on a Thursday , then the weeks are shifted so that there will be 53 weeks in that year.

These week numbers are commonly used in some European and Asian countries; but not so much in the United States. Topics: Calendar , Dates , Weekdays.