date -bug: blank in Timestamp

Hi.
when generating a timestamp with
date --date='2002-03-08 08:50:02' +%Y%m%d%k%M%S
i get a blank in the response:
20020308 85002

after time has raised it looks like this:
date --date='2002-03-08 18:50:02' +%Y%m%d%k%M%S
20020308185002
This is o.k.

Problem seems to be the hour, if only one  digit is reserved.
Is it a bug or how have i to tell date that i want to have a 0 instead of an 
blank?

date --version tells me:
(GNU sh-utils) 2.0
Written by David Mackenzie

-- 
Herm