What does it mean

[Filipko]

set logfile-suffix ".%d%b%Y"
how it could be right for using
if some of you knows it I will enjoy your help and will use it thanks everyone

[Papillon]

http://tcl.activestate.com/man/tcl8.4/TclCmd/clock.htm
all date-format settings are explained there
".%d%b%Y" will return ".07Mar2003"

[caesar]

Try a {%d %b %Y} to separate them. Also read the page Papillon sugested you.