Deltadays and date functions.

[Dieter]

(05-10-2017 05:12 PM)Vtile Wrote:  Heh. It definedly is easy when one knows what he is doing. Superb post Dieter, many thanks. I'll take a closer look at it tomorrow, as I have already spend too much time today reading about the calendar system(s).

Thank you very much. With just a few additional steps the program should even work for any valid Gregorian date (i.e. since 15 Oct 1582) that does not cause roundoff errors when Y is multiplied by 365,25 – but well, I did not test any year. ;-)

Code:

... ...
031 INT
032 +
033 RCL 0
034 EEX
035 2
036 /
037 INT
038 -
039 LstX
040 4
041 /
042 INT
043 +
044 RTN

Example:
31 [ENTER] 12 [ENTER] 9999  f [D] => 3652487
15 [ENTER] 10 [ENTER] 1582  f [D] =>  578164
[–] => 3074323 days

Dieter

Edit: changed first steps of the code to reflect edited version of original program.