What's the exact behaviour of '-D date-spec'?

[Evan Lavelle]

What is the behaviour of '-D date-spec' without a time, and with a time?

The manual says "Use the most recent revision no later than date_spec". 
But CVS 1.11.17 doesn't seem to do this. Without a time, it seems to be 
"use the most recent revision no later than time 00:01 on date-spec". 
Surely no later than, for example, January 24th should actually mean no 
later than 23:59 on Jan 24th? The timed version also seems to be 
incorrect: it seems to be an hour out (daylight saving?!)

I have a repository with no tags, and I need to retrieve the version 
which was checked in at the end of the day on 1999-08-10 (there may have 
been more than one version checked in that day). I've tested this on one 
file which has this log:

----------------------------
revision 1.4
date: 2000/01/31 09:51:37;
----------------------------
revision 1.3
date: 1999/08/10 11:00:45;
----------------------------
revision 1.2
date: 1999/03/09 16:24:13;
----------------------------

Here are the results (cvs update -D"x"):

Date               Gets version
----------         ------------
1999-08-10         1.2
1999-08-11         1.3
1999-08-10 11:15   1.2
1999-08-10 12:00   1.2
1999-08-10 12:01   1.3
1999-08-10 12:15   1.3
1999-08-10 13:00   1.3
1999-08-10 23:59   1.3

My reading is that *all* these updates should have got v1.3.

Thanks -

Evan