How can enter today's date with a TextExpander snippet?

Here are a few examples of special snippets that you can use to insert current date and time:
 

%e %B %Y = 26 August 2011
%m/%d/%y = 08/26/11
%A, %B %e, %Y = Friday, August 26, 2011
%1I:%1M:%S %p = 4:02:41 PM

Use the following special codes to insert days, months, years, and times.

%Y = Year, 4 digits (2011)
%y = Year, 2 digits (11)
%B = Month, long name (January)
%b = Month, short name (Jan)
%m = Month, 2 digits (01-12)
%1m = Month, 1-2 digits (1-12)
%A = Day, long name (Monday)
%a = Day, short name (Mon)
%d = Day, 2 digits (01-31)
%e = Day, 1 digit (1-31)

%1H = Hour, 24-hour clock, 1-2 digits (0-23)
%H = Hour, 24-hour clock, 2 digits (00-23)
%I = Hour, 12-hour clock, 2 digits (00-12)*
%1I = Hour, 12-hour clock, 1-2 digits (0-12)*
%M = Minute, 2 digits (00-59)
%1M = Minute, 1-2 digits (0-59)
%S = Second, 2 digits (00-59)
%1S = Second, 1-2 digits (0-59)
%p = Time, AM/PM

*Note the codes for 12-hour clock use a capital letter i

%date:<Unicode Date Format>%

(where <Unicode Date Format> is defined here: 

http://unicode.org/reports/tr35/#Date_Format_Patterns)

You can also have TextExpander expand the date or time macros above based on a time relative to today, such as tomorrow's date. See "Date / Time Math" on this help page for details.