Date and time

Explanation of tables
*green Function exists in octave 2.0.x
Noted incompatibilities and missing features
+yellow Function exists in matcompat
Author and home for the function.
?orange Function doesn't exist
Explanation of what you can do instead.
xred Function doesn't exist, and no work-around

Clock functions
+now
Paul Kienzle
*date
*clock
*cputime
*tic
*toc
*etime

Date conversion
+datenum
Paul Kienzle; but using mktime which, for 32 bit machines, is limited to 1902-2038; a better solution is to incorporate day_nr and ymd_dnr from the mathworks archive
+datestr
Paul Kienzle
+datevec
Paul Kienzle
+weekday
Paul Kienzle
xeomday
xcalendar
?datetick
gset xdata time; gset timefmt "%d/%m"; gset format x "%b %d"