Enables the use of time calculations and declarations, like 45.minutes +
2.hours + 4.years.
These methods use Time#advance for precise date calculations when using from_now, ago,
etc. as well as adding or subtracting their results from a Time object. For example:
# equivalent to Time.now.advance(:months => 1)
1.month.from_now
# equivalent to Time.now.advance(:years => 2)
2.years.from_now
# equivalent to Time.now.advance(:months => 4, :years => 5)
(4.months + 5.years).from_now
While these methods provide precise calculation when used as in the
examples above, care should be taken to note that this is not true if the
result of `months’, `years’, etc is converted before use:
# equivalent to 30.days.to_i.from_now
1.month.to_i.from_now
# equivalent to 365.25.days.to_f.from_now
1.year.to_f.from_now
In such cases, Ruby‘s core Date
and Time
should be used for precision date and time arithmetic