Rails number of weeks in month

i dont know exactly what you want... But maybe you want something like this:

(Time::days_in_month(05,2010).to_f / 7)

#> 4.42857142857143

I needed to know how many weeks including partial weeks there were in a month. Think of it like rows in a calendar. How many rows do you need? You have to consider the number of days and also what day the month starts on. October 2011 actually has 6 unique weeks for example.

This is my answer (@date is the current date):

@week_count = (0.5 + (@date.at_end_of_month.day + @date.at_beginning_of_month.wday).to_f / 7.0).round

You can use the following methods:

  WEEK_NUMBER_FORMAT = '%W'

  # Returns the first day of month.
  # If invoked without any arguments, this would return the
  # first day of current month
  def first_day_of_month(date_time=Time.now)
    date_time.beginning_of_month
  end

  # Returns the last day of month.
  # If invoked without any arguments, this would return the
  # last day of current month
  def last_day_of_month(date_time=Time.now)
    date_time.end_of_month
  end

  # Returns the week number in the year in which the specified date_time lies.
  # If invoked without any arguments, this would return the
  # the week number in the current year
  def week_number(date_time=Time.now)
    date_time.strftime(WEEK_NUMBER_FORMAT).to_i
  end

  # Returns the number of weeks in the month in which the specified date_time lies.
  # If invoked without any arguments, this would return the
  # the number of weeks in the current month
  def weeks_in_month(date_time=Time.now)
    week_number(last_day_of_month(date_time)) - week_number(first_day_of_month(date_time))  + 1
  end

Usage: weeks_in_month(date_time)

Hope it helps:

Thanks,

Jignesh