cheat sheets.

--- strftime version 43	Fri Oct 27 20:52:13 +0000 2006
+++ strftime version 50	Fri Mar 21 20:47:36 +0000 2008
@@ -1,2 +1,36 @@
-oops!
+%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)
+  %e - Day of the month without leading zeroes (1..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)
+  %k - Hour of the day, 24-hour clock w/o leading zeroes ( 0..23)
+  %l - Hour of the day, 12-hour clock w/o leading zeroes ( 1..12)
+  %m - Month of the year (01..12)
+  %M - Minute of the hour (00..59)
+  %p - Meridian indicator (``AM''  or  ``PM'')
+  %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 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
+
+   t = Time.now
+   t.strftime("Printed on %m/%d/%Y")   #=> "Printed on 04/09/2003"
+   t.strftime("at %I:%M%p")            #=> "at 08:56AM"
+   t.strftime("%e %B, %Y")	       #=> "9 April, 2003"