advance (ActiveSupport::CoreExtensions::DateTime::Calculations)

    # File lib/active_support/core_ext/date_time/calculations.rb, line 63
            def advance(options)
              d = to_date.advance(options)
              datetime_advanced_by_date = change(:year => d.year, :month => d.month, :day => d.day)
              seconds_to_advance = (options[:seconds] || 0) + (options[:minutes] || 0) * 60 + (options[:hours] || 0) * 3600
              seconds_to_advance == 0 ? datetime_advanced_by_date : datetime_advanced_by_date.since(seconds_to_advance)
            end