There is a prototype automatic logging routine that constructs a TeX version of the observing log. Instructions may be obtained via anonymous ftp to ``ftp.noao.edu", cd kpno/manuals, binary, get ccdlogs2.ps.Z. Comments should be directed to firstname.lastname@example.org.
Under ``Astronomer tools" in the root menu, there is an ephemeris program (``xephem"), provided by Elwood Downey, that will tell you the Julian date and times of sunrise, sunset, and twilight, and many more wonderful things. (Do a Unix level ``man xephem" for more information.)