strftime() formatting of dates (for xSSI, et al.)

Unconfig'd DATE_LOCAL (for example): Wednesday, 10-Jul-2013 09:18:44 MDT

argresultdescribed by strftime() man page
%a Wed The abbreviated weekday name according to the current locale.
%A Wednesday The full weekday name according to the current locale.
%b Jul The abbreviated month name according to the current locale.
%B July The full month name according to the current locale.
%c Wed Jul 10 09:18:44 2013 The preferred date and time representation for the current locale.
%C 20 The century number (year/100) as a 2-digit integer. (SU)
%d 10 The day of the month as a decimal number (range 01 to 31).
%D 07/10/13 Equivalent to %m/%d/%y. (Yecch-for Americans only. Americans should note that in other countries %d/%m/%y is rather common. This means that in international context this format is ambiguous and should not be used.) (SU)
%e 10 Like %d, the day of the month as a decimal number, but a leading zero is replaced by a space. (SU)
%E %E Modifier: use alternative format, see below. (SU)
%F 2013-07-10 Equivalent to %Y-%m-%d (the ISO 8601 date format). (C99)
%G 2013 The ISO 8601 week-based year (see NOTES) with century as a decimal number. The 4-digit year corresponding to the ISO week number (see %V). This has the same format and value as %Y, except that if the ISO week number belongs to the previous or next year, that year is used instead. (TZ)
%g 13 Like %G, but without century, that is, with a 2-digit year (00-99). (TZ)
%h Jul Equivalent to %b. (SU)
%H 09 The hour as a decimal number using a 24-hour clock (range 00 to 23).
%I 09 The hour as a decimal number using a 12-hour clock (range 01 to 12).
%j 191 The day of the year as a decimal number (range 001 to 366).
%k 9 The hour (24-hour clock) as a decimal number (range 0 to 23); single digits are preceded by a blank. (See also %H.) (TZ)
%l 9 The hour (12-hour clock) as a decimal number (range 1 to 12); single digits are preceded by a blank. (See also %I.) (TZ)
%m 07 The month as a decimal number (range 01 to 12).
%M 18 The minute as a decimal number (range 00 to 59).
%n A newline character. (SU)
%O %O Modifier: use alternative format, see below. (SU)
%p AM Either "AM" or "PM" according to the given time value, or the corresponding strings for the current locale. Noon is treated as "PM" and midnight as "AM".
%P am Like %p but in lowercase: "am" or "pm" or a corresponding string for the current locale. (GNU)
%r 09:18:44 AM The time in a.m. or p.m. notation. In the POSIX locale this is equivalent to %I:%M:%S %p. (SU)
%R 09:18 The time in 24-hour notation (%H:%M). (SU) For a version including the seconds, see %T below.
%s 1373469524 The number of seconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). (TZ)
%S 44 The second as a decimal number (range 00 to 60). (The range is up to 60 to allow for occasional leap seconds.)
%tA tab character. (SU)
%T 09:18:44 The time in 24-hour notation (%H:%M:%S). (SU)
%u 3 The day of the week as a decimal, range 1 to 7, Monday being 1. See also %w. (SU)
%U 27 The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01. See also %V and %W.
%V 28 The ISO 8601 week number (see NOTES) of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the new year. See also %U and %W. (SU)
%w 3 The day of the week as a decimal, range 0 to 6, Sunday being 0. See also %u.
%W 27 The week number of the current year as a decimal number, range 00 to 53, starting with the first Monday as the first day of week 01.
%x 07/10/13 The preferred date representation for the current locale without the time.
%X 09:18:44 The preferred time representation for the current locale without the date.
%y 13 The year as a decimal number without a century (range 00 to 99).
%Y 2013 The year as a decimal number including the century.
%z -0600 The +hhmm or -hhmm numeric timezone (that is, the hour and minute offset from UTC). (SU)
%Z MDT The timezone or name or abbreviation.
%+ %+ The date and time in date(1) format. (TZ) (Not supported in glibc2.)
%% % A literal '%' character.