There are 12 months of the year using the Gregorian calendar and they are:
January
February
March
April
May
June
July
August
September
November
December
There are many other calendars and each have different numbers of months and use different names
Months is plural when discussing the number. "How many months are in a year?"
140 months is 140 months BYE
when your five months pregnant how many weeks are you? when your five months pregnant how many weeks are you?
How many months is 3.25 years
How many days in 8 months
47 months.
20 months
18 months
Five months.
About 2 months and a half. It depends on what months.
89 months
she is 6 months