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C Library Functions  - ordinal_to_date (3)

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NAME

ordinal_to_date(3f) - [M_time:ORDINAL_DAY] when given a valid year and day of the year returns the DAT array for the date (LICENSE:MIT)

CONTENTS

Synopsis
Description
Options
Returns
Example

SYNOPSIS

subroutine ordinal_to_date(yyyy, ddd, dat)

      integer, intent(in)   :: yyyy
      integer, intent(in)   :: ddd
      integer, intent(out)  :: dat

DESCRIPTION

When given a valid year, YYYY, and day of the year, DDD, returns the date as a DAT date array

OPTIONS

yyyy	known year
ddd	known ordinal day of the year

RETURNS

dat	DAT array describing the date

EXAMPLE

Sample program:

    program demo_ordinal_to_date
    use M_time, only : ordinal_to_date
    implicit none
    integer :: yyyy, ddd, mm, dd, yy
    integer :: dat(8)
    integer :: i, iostat
    character(len=:),allocatable :: fakefile(:)
      fakefile=[character(len=80) :: ’ 2024 273 ’,’2024 001’]
      do i=1,size(fakefile)
         ! Enter year YYYY and ordinal day of year DD
         read(fakefile(i),*,iostat=iostat)yyyy,ddd
         if(iostat/=0)exit
         ! recover month and day from year and day number.
         call ordinal_to_date(yyyy, ddd, dat)
         yy=dat(1)
         mm=dat(2)
         dd=dat(3)
         write(*,’(*(g0))’)’For Year ’,yyyy,’ and Ordinal day ’,ddd
         write(*,’(*(g0))’)’ Month is ’,mm,’ and Day of Month is ’,dd, &
         & ’ and Year is ’,yy
      enddo
    end program demo_ordinal_to_date

Result:

    > For Year 2024 and Ordinal day 273
    > Month is 9 and Day of Month is 29 and Year is 2024
    > For Year 2024 and Ordinal day 1
    > Month is 1 and Day of Month is 1 and Year is 2024

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Nemo Release 3.1

ordinal_to_date (3)

June 29, 2025

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