def date(input, format)
      return input if format.to_s.empty?

      return input unless date = Utils.to_date(input)

      date.strftime(format.to_s)
    end
def date(input, format)
      return input if format.to_s.empty?

      return input unless date = Utils.to_date(input)

      date.strftime(format.to_s)
    end
Reformat a date using Ruby's core Time#strftime( string ) -> string

   %a - The abbreviated weekday name (``Sun'')
   %A - The  full  weekday  name (``Sunday'')
   %b - The abbreviated month name (``Jan'')
   %B - The  full  month  name (``January'')
   %c - The preferred local date and time representation
   %d - Day of the month (01..31)
   %H - Hour of the day, 24-hour clock (00..23)
   %I - Hour of the day, 12-hour clock (01..12)
   %j - Day of the year (001..366)
   %m - Month of the year (01..12)
   %M - Minute of the hour (00..59)
   %p - Meridian indicator (``AM''  or  ``PM'')
   %s - Number of seconds since 1970-01-01 00:00:00 UTC.
   %S - Second of the minute (00..60)
   %U - Week  number  of the current year,
           starting with the first Sunday as the first
           day of the first week (00..53)
   %W - Week  number  of the current year,
           starting with the first Monday as the first
           day of the first week (00..53)
   %w - Day of the week (Sunday is 0, 0..6)
   %x - Preferred representation for the date alone, no time
   %X - Preferred representation for the time alone, no date
   %y - Year without a century (00..99)
   %Y - Year with century
   %Z - Time zone name
   %% - Literal ``%'' character

   See also: http://www.ruby-doc.org/core/Time.html#method-i-strftime