Week Numbers 1 week ahead in Outlook

Today when I came in office I saw an email from my boss. He was asked by one the bussiness heads that why the week numbers in outlook would show one week ahead?

Here is a little background about the week numbers:

Week number according to the ISO-8601 standard, weeks starting on Monday. The first week of the year is the week that contains that year’s first Thursday. The highest week number in a year is either 52 or 53 and outlook is fully compliant to this specification.

Normally, when we configure the outlook profile we do not pay much attention to a very small calendar setting which actually manages all this week number related stuff. Its pretty simple to configure. In common situations the calendar is configured to use the 1 Jan of the year as the first week of the year. Which results in this mismatch of outlook calendar numbering.

 To correct it you can simply go to 

Tools –> Options –> Calendar Options –>