How to tag by date on a branch with rtag?

[Dickson, Craig]

Is there a way to tag files on a branch based on a date using rtag? The script I am writing won't have access to a working copy of the branch.

I tried something like:
    cvs rtag -D <date> -r <branch tag> <module>

But I got an error which impled that I can either have a -D or a -r option, but not both.

Any ideas?

Thanks.