**120 days is equivalent to four calendar months or one quarter of the year. Each month has an average of 30.4 days, which is why 120 days is equal to four months.**

A leap year consists of 366 days and therefore contains an extra day compared to the normal calendar year. This does change the equation slightly, as a leap year consists of five calendar months for every 120 days.

Calculating the exact amount of months for a specific duration of days can be done through simple math. Divide the number of days by 30.4 and round the answer up to the nearest whole number. For example, if you have 280 days, divide it by 30.4 and round up the answer to nine. That means that 280 days would equate to nine calendar months.

120 days is equivalent to four calendar months or one quarter of the year. Each month has an average of 30.4 days, which is why 120 days is equal to four months.A leap year consists of 366 days and therefore contains an extra day compared to the normal calendar year. This does change the equation slightly, as a leap year consists of five calendar months for every 120 days.

Calculating the exact amount of months for a specific duration of days can be done through simple math. Divide the number of days by 30.4 and round the answer up to the nearest whole number. For example, if you have 280 days, divide it by 30.4 and round up the answer to nine. That means that 280 days would equate to nine calendar months.