Converting julian date to calendar

[pjb]

Is there a way to convert julian date to calendar format? To convert calendar to julian, I have used strftime(). Now I need to go from julian to calendar.

 

[aigles]

Hi,

I don't know any function that convert julian to calendar.
Write your own function ...

For example this awk program convert julian date in the form 'year day_of_year' to calendar innthe form 'year-month-day'

---- jul2cal.awk ---
BEGIN {
split("31,28,31,30,31,30,31,31,30,31,30,31",DM,","
}

function IsLeapYear {
return (y % 4 == 0) && ((y % 100 != 0) || (y % 400 ==0))
}

function Jul2Cal(y,d ,m) {
DM[2] = (IsLeapYear ? 29 : 28);
for (m=1; m<=12; m++) {
if (DM[m] >= d) break ;
d -= DM[m] ;
}
return sprintf(&quot;%04d-%02d-%02d&quot;,y,m,d) ;
}
{
print Jul2Cal($1, $2);
}
-------------------------
Jean Pierre.