Adding tag to branch based on date

I have a branch named 'PHASE1' on the directory 'src' in my CVS repository.
I need to add a tag XYZ to 'src' on that branch based on the date 2005-01-10
(yyyy-mm-dd format)

After checking out from the branch PHASE1, I tried to execute
cvs tag -D 2005-01-10 XYZ src

But the tag is getting added to revisions on the HEAD branch corresponding
to that date and not to the PHASE1 branch. Is there any way I can accomplish
what I need?

Thanks in advance for all your help.

Regards,
Bijo

_________________________________
Bijo Alex Thomas
DSRC, 6, Smith Road, Chennai - 2
Mail: bijoalex@xxxxxxxxxx
Website: http://dsrc.com