ymdhms-day-difference

function

Library: Date and time functions (OMDATE)
Include: omdate.xin

Returns: Returns the number of days difference between two given dates.

Declaration

define integer function ymdhms-day-difference
              (value string a, value string b)

Argument definitions

a: the first date in "YYYYMMDDhhmmss+ZHZM" format

b: the second date, also in "YYYYMMDDhhmmss+ZHZM" format

Purpose

This function takes two dates and returns a signed value representing the number of days difference between them. The result is rounded down to the largest number of days less than or equal to the difference. The date/times can be in different time zones.

Example:

  include "omdate.xin"
  process
     local integer elapsed-days
     set elapsed-days to ymdhms-day-difference("19980416155545+0500", "19710401080000+0000")
     output "%d(elapsed-days) days have elapsed between the specified dates/times.%n"
  ; The result of this program is:
  ;      9877 days have elapsed between the specified dates/times.

Other Library Functions