TinTin++ Mud Client Manual
         TIME

Command: #format {variable} {%t} {argument}

         The %t format specifier of the #format command allows printing dates
         using the strftime() format specifiers. By default the time stamp used
         is the current time, if you want to print a past or future date use:

Command: #format {variable} {%t} {{argument} {{epoch time}}

         The current epoch time value is obtained using #format {time} {%T}.

         When using %t the argument should contain strftime format specifiers.
         The output may differ depending on your locale.

         %a  Abbreviated name of the day of the week (mon ... sun).
         %A  Full name of the day of the week. (Monday ... Sunday)
         %b  Abbreviated name of the month (Jan ... Dec)
         %B  Full name of the month. (January ... December)
         %C  2 digit numeric century. (19 ... 20)
         %d  2 digit numeric day of the month (01 ... 31)
         %H  2 digit numeric 24-hour clock hour. (00 ... 23)
         %I  2 digit numeric 12-hour clock hour. (01 ... 12)
         %j  3 digit numeric day of the year (001 ... 366)
         %m  2 digit numeric month of the year (01 ... 12)
         %M  2 digit numeric minute of the hour (00 ... 59)
         %p  Abbreviated 12 hour clock period (AM ... PM)
         %P  Abbreviated 12 hour clock period (am ... pm)
         %S  2 digit numeric second of the minute (00 ...59
         %u  1 digit numeric day of the week (1 ... 7)
         %U  2 digit numeric Sunday week of the year (00 ... 53
         %w  1 digit numeric day of the week (0 ... 6)
         %W  2 digit numeric Monday week of the year (00 ... 53
         %y  2 digit numeric year. (70 ... 38)
         %Y  4 digit numeric year. (1970 ... 2038)
         %z  5 digit timezone offset. (-1200 ... +1400)
         %Z  Abbreviated name of the time zone.

Related: echo, event and format.