ymdhms-julian-day-count

function

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

Returns: Returns the Julian day of the specified date, with 1 January being day number 1 (one).

Declaration

define integer function 
   ymdhms-julian-day-count value string ymd

Argument definitions

ymd: a date in YYYYMMDD format

Purpose

ymdhms-julian-day-count takes a date in YYYYMMDD format and returns the Julian day—the number of the day within the year, with 1 January being day number 1 (one). ymd can be longer and contain a time portion, but the part beyond the date is ignored.

Example

The following example outputs the Julian day of the current date.

  include "omdate.xin"
  
  process
     output "Julian day number of today = "  
         || "d" % (ymdhms-julian-day-count now-as-ymdhms) 
         || "%n"

The output of this program might be

  Julian day number of today = 304

Usage Note

To use ymdhms-julian-day-count, you must include the following code near the top of your program:

  include "omdate.xin"

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