Find number of months between two Dates in Ruby on Rails

Question

I have two Ruby on Rails DateTime objects. How to find the number of months between them? (Keeping in mind they might belong to different years)

Answer 1

(date2.year * 12 + date2.month) - (date1.year * 12 + date1.month) 

more info at http://www.ruby-forum.com/topic/72120

Answer 2

A more accurate answer would consider days in the distance.

For example, if you consider that the month-distance from 28/4/2000 and 1/5/2000 is 0 rather than 1, then you can use:

(date2.year - date1.year) * 12 + date2.month - date1.month - (date2.day >= date1.day ? 0 : 1)