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Full Discussion: Day of month and year to mmddyyyy
Top Forums Shell Programming and Scripting Day of month and year to mmddyyyy Post 302196775 by jim mcnamara on Monday 19th of May 2008 12:23:48 PM
Old 05-19-2008
from the datecalc FAQ - Julian date thread
Quote:
Originally Posted by Perderabo
What you're doing is more of a day-of-year thing rather than a Julian number thing. But a Julian number calculator can handle this stuff easily.

Get the Julian number for the day before Jan 1 of the year in question:
datecalc -j 2002 12 31
52639

Now calculate the JD of the date you want:
52740=52639+101

Lastly, convert that to a date:
datecalc -j 52740
2003 4 11

Of course, you will want to read the output of the last command into some variables, not just display them.

With ksh, this is really just a one-liner:
Code:
Y=2003
DOY=101
datecalc -j $(($(datecalc -j $((Y-1)) 12 31) + DOY)) | read year month day

You can get datecalc here.
hth
 

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LEARN ABOUT PHP

cal_to_jd

CAL_TO_JD(3)								 1							      CAL_TO_JD(3)

cal_to_jd - Converts from a supported calendar to Julian Day Count

SYNOPSIS

       int cal_to_jd (int  $calendar, int  $month, int	$day, int  $year)

DESCRIPTION

       cal_to_jd(3)  calculates  the  Julian  day count for a date in the specified $calendar. Supported $calendars are CAL_GREGORIAN, CAL_JULIAN,
       CAL_JEWISH and CAL_FRENCH.

PARAMETERS

	      o $calendar
		- Calendar to convert from, one of CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH or CAL_FRENCH.

	      o $month
		- The month as a number, the valid range depends on the $calendar

	      o $day
		- The day as a number, the valid range depends on the $calendar

	      o $year
		- The year as a number, the valid range depends on the $calendar

RETURN VALUES

	A Julian Day number.

SEE ALSO

       cal_from_jd(3), frenchtojd(3), gregoriantojd(3), jewishtojd(3), juliantojd(3), unixtojd(3).

PHP Documentation Group 													      CAL_TO_JD(3)
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