13th month bonus

Why is there a 13th month bonus when its really isn't a bonus? The mystery is finally revealed! When the British were in Singapore , they were being paid weekly & they argued that Singaporeans were actually being cheated into believing that the 13th month pay is a bonus. Singaporeans are being paid monthly which is equivalent to 4 weeks pay coz there are 4 weeks in a month. As the British were paid weekly, it worked out the same.
You see, there are
7 days in a week.
4 weeks in a month.
12 months in a year.
Then 12 months should work out to 48 weeks only. But 1 year worked out to 52 weeks!!! Hence the 13th month is your own pay (not bonus??!!). ( 365 days divide by 7 day = 52..... weeks GET IT!!!!!! OK!!!! )
So, the British argued that there is in fact no
bonus at all??? It is a very simple calculation that
stunned many!!!!

BONUS ??? What bonus??? ... !!!
there should be 14th month pay :)