Among its functions, the config SSI command allows you to specify the way the time and date are displayed with the timefmt argument, and it takes a number of special values that are summarized in the table below.
The config command in the following example makes use of two of those special time values:
<!--#config timefmt="%D %r"-->
The file address.html was last modified on: 
        <!--#flastmod file="address.html"-->.
where %D specifies that the date appear in "mm/dd/yy" format, and %r specifies that the time appear as "hh/mm/ss AM|PM."
Thus the previous example would produce output such as:
The file address.html was last modified on: 12/23/95 07:17:39 PM
| Status Code | Meaning | Example | 
|---|---|---|
| %a | Day of the week abbreviation | Sun | 
| %A | Day of the week | Sunday | 
| %b | Month name abbreviation (also %h) | Jan | 
| %B | Month name | January | 
| %d | Date | 01 | 
| %D | Date as "%m/%d/%y" | 06/23/95 | 
| %e | Date | 1 (not 01) | 
| %H | 24-hour clock hour | 13 | 
| %I | 12-hour clock hour | 01 | 
| %j | Decimal day of the year | 360 | 
| %m | Month number | 11 | 
| %M | Minutes | 08 | 
| %p | AM | PM | AM | 
| %r | Time as "%I:%M:%S %p" | 09:21:13 PM | 
| %S | Seconds | 09 | 
| %T | 24-hour time as "%H:%M:%S" | 12:22:40 | 
| %U | Week of the year (also %W) | 37 | 
| %w | Day of the week number | 2 | 
| (starting with Sunday=0) | ||
| %y | Year of the century | 96 | 
| %Y | Year | 1996 | 
| %Z | Time zone | EST |