Life is simple! Don’t make it complicated

# Added default date/time display
ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS[:default] = "%m/%d/%Y %I:%M%p"
ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMATS[:default] = "%m/%d/%Y"

>> Time.now
=> Thu Sep 25 01:24:30 +0800 2008
 
>> Date.today
=> Thu, 25 Sep 2008
 
>> Time.today.at_midnight
=> Thu Sep 25 00:00:00 +0800 2008

>> Date.today.strftime("%m/%d/%y")
=> "09/25/08"
 
>> Date.today.strftime("%m/%d/%Y")
=> "09/25/2008"

   %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 - Second of the minute (00..60)
   %U - Week  number  of the current year,
        starting with the first Sunday as the firs
        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