People are confused as to how to sit shiva and how to properly pay a shiva call. Because people do not know, and because talking about death makes people nervous and awkward, the shiva house often turns into a festive gathering filled with nervous chatter, instead of the proper house of mourning.
The average number of days in a month is around 30.4. With 24 hours in a day, this is an average of about 730 hours per month.
Those are the average days in a month. Then, Divide that number by 7 (the number of days in a week). There is your (nearly)exact answer. Never mind, here it is... 4.348 weeks in a month. 365.25/12/7=4.348. For more information about weeks days, years, and the different types, try wikipedia at the following link...