Here we are talk about business Day ( Working Days ). Any formal weekday is referred a “business day” or “working day”. This includes days between Monday and Friday in most areas (including). Weekends and national and religious holidays celebrated in a particular nation are not included. There are approximately 20 working days in a month.

           But why in Western countries do we work from Monday to Friday ? Why do we have seven days a week ?

         There are many who disagree, despite the widespread belief that the concept of the seven-day workweek originated in Babylon and is based on the lunar cycle. Some say that the Jewish people came up with a similar approach to dividing the month for entirely different reasons. Evidence supporting the latter argument seems to point to the employment of such seven-day cycles by the Judeans, independent of the Moon, in the sixth century BC .

       But . Even though where, when, and why weeks were invented remains a mystery to us, one thing is certain: a large part of the world still uses weeks with seven days. Which also marks when are work days (including school days) and when are rest days.

      By 1955 , the United States, Canada, and the United Kingdom had adopted the two-day weekend. This was the result of several circumstances and it took decades for companies to adopt the concept. It was not until the 1970s that the 40-hour work week became the norm in Europe and then the Middle East. It is generally used in conjunction with the Gregorian calendar, although not exclusively. Most nations also share the practice of having two days off each week, although cultural differences may affect which days these are. Most Western civilizations observe Saturday and Sunday as their days off and Monday through Friday as their workdays.

        But here it is also important to know that,
        Some countries have one-day weekends or weekends that start on Friday and end on Saturday, in which case this calculator is not suitable.