class Integer

def months

(4.months + 5.years).from_now
# equivalent to Time.now.advance(months: 4, years: 5)

2.years.from_now
# equivalent to Time.now.advance(years: 2)

1.month.from_now
# equivalent to Time.now.advance(months: 1)

results from a Time object.
from_now, +ago+, etc. as well as adding or subtracting their
These methods use Time#advance for precise date calculations when using

2.hours + 4.years.
Enables the use of time calculations and declarations, like 45.minutes + 
def months
  ActiveSupport::Duration.new(self * 30.days, [[:months, self]])
end