The number of weeks in seven months vary due to the different number of days in each month, but seven months is roughly 30 weeks. A month has around 4.35 weeks on average.
A week is defined as a span of seven consecutive days. The number of weeks in a certain span of time is calculated by dividing the number of days by seven. All the months in the calendar have either 30 or 31 days except for February, which has either 28 or 29 days. All months have more than four weeks except for February in a non-leap year. A month cannot be accurately converted into four weeks because the remaining days are not accounted for.