Time Calculation using Ruby

example.rb

require_relative './time_calculation.rb'

distance = Time.new - Time.parse('2016-1-1')
puts TimeCalculation.humanize(distance)+"\r"

Date_of_birth = '1888-2-15'
3.times do
  distance = Time.new - Time.parse(Date_of_birth)
  puts TimeCalculation.humanize(distance, false)+"\r"
  sleep 1
end

time_calculation.rb

require 'time'

class TimeCalculation
  def self.pluralize(count, noun)
    if count != 0
      count == 1 ? "#{count.to_i} #{noun}" : "#{count.to_i} #{noun}s"
    end
  end

  def self.humanize(secs, short = true)
    output = [
      [60, :second],
      [60, :minute],
      [24, :hour],
      [365, :day],
      [100, :year]
      ].map do |count, name|
        if secs > 0
          secs, n = secs.divmod(count)
          pluralize(n, name)
        end
    end

    if short
      output.compact.reverse[0]
    else
      output.compact.reverse.join(' ')
    end
  end
end

Initially based on: https://coderwall.com/p/fdlfia/calculate-your-age-in-years-days-hours-minutes-seconds-in-ruby
It doesn't solve 100% of cases. For better results: https://github.com/radar/dotiw