Hallo Ernest, I have discovered the bug. It was from tha java.uil.Date class. I have defined the dates using this class and the bug came from the second argument of the new constructor (year, month, day, hour, minutes). I thought I have defined the month August , but it was September (new Date(year-1900, month, day, hour, minutes). Therefore, I have substract 1 from the argument representing the month and I have solved the problem.
Ana --- On Fri, 9/3/10, Ernest Friedman-Hill <ejfr...@sandia.gov> wrote: From: Ernest Friedman-Hill <ejfr...@sandia.gov> Subject: Re: JESS: Difference between dates To: "jess-users" <jess-users@sandia.gov> Date: Friday, September 3, 2010, 2:08 PM I don't know how this could be; if you have a time difference in milliseconds, and you divide it by 86400000, you have a time difference in days. The number of days in a month does not enter into it at all. On Sep 3, 2010, at 6:05 AM, ANA TANASESCU wrote: > Hallo again, > > I have read on JessWiki about working with Dates and I have found a few > interesting functions. I need in my program to calculate the difference > between two dates (number of days). Therefore, I have converted the date in > milisecond, I have used the diff-time function > (http://www.jessrules.com/jesswiki/view?DiffTime) and converted the result in > days. > First it seems to work, but if I use month like february it looks that this > function considers that all months have 30 days. > I thought that after converting in miliseconds I could use this function like > datediff in ACCESS. > What shall I do? > > Best regards, > Ana > > --------------------------------------------------------- Ernest Friedman-Hill Informatics & Decision Sciences, Sandia National Laboratories PO Box 969, MS 9012, Livermore, CA 94550 http://www.jessrules.com -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' in the BODY of a message to majord...@sandia.gov, NOT to the list (use your own address!) List problems? Notify owner-jess-us...@sandia.gov. --------------------------------------------------------------------
