>Anyone know how to get a Julian Day (not date - that's SYS(1) I think).
>
>Apparently, it's a three digit number - that's about all I know. Before I call the client and look stupid in front of him, I thought I'd try it here first.
>
>Thanks.

Howard;


Julian dates are widely used as time variables for precision measurements. As a metrologist (science of measurement) we used this system for a number of measurements.

The Julian and Gregorian systems (which the western world uses today) were created by Popes at different periods in history.


A basic difference between the two systems of time is the Julian calendar has a leap year every fourth year, while the Gregorian calendar has a leap year every fourth year except century years not exactly divisible by 400.

Depending upon your needs you may be able to use sys(1), sys(10), or sys(11). Better understand your customers requirements though so you will know how to apply the proper approach.

In scientific work it may use 64-bit floating point (double precision) as an example.


Tom