C Library Functions - d2u (3)

NAME

d2u(3f) - [M_time:UNIX_EPOCH] given DAT date-time array returns Unix Epoch Time (UET starts at 0000 on 1 Jan. 1970, UTC) (LICENSE:MIT)

Synopsis
Description
Options
Returns
Example
Author
License

SYNOPSIS

function d2u(dat) result(unixtime)

      integer,intent(in),optional :: dat(8)
      real(kind=realtime)         :: unixtime

DESCRIPTION

Converts a DAT date-time array to a Unix Epoch Time value. Typically mathematical operations such as sums, sorting and comparison are performed with simple UET numeric values, and then they are converted back.

OPTIONS

dat Integer array holding a "DAT" array, similar in structure to the array returned by the intrinsic DATE_AND_TIME(3f):
                dat=[ year,month,day,timezone,hour,&
                 & minutes,seconds,milliseconds]
If not present the current time is used

RETURNS

unixtime
The "Unix Epoch" time, or the number of seconds since 00:00:00 on January 1st, 1970, UTC.

EXAMPLE

Sample program:

    program demo_d2u
    use M_time, only : d2u
    implicit none
    integer           :: dat(8)
       call date_and_time(values=dat)
       write(*,’(" Today is:",*(i0:,":"))’)dat
       write(*,*)’Unix Epoch time is ’,d2u(dat)
    end program demo_d2u

results:

Today is:2016:7:19:-240:2:0:48:561 Unix Epoch time is 1468908048.5610321

AUTHOR

John S. Urban, 2015

LICENSE

MIT

Nemo Release 3.1

d2u (3)

June 29, 2025

Generated by manServer 1.08 from 59a2eb17-dafc-47bf-abd3-37b35db66264 using man macros.

unixtime
	The "Unix Epoch" time, or the number of seconds since 00:00:00 on January 1st, 1970, UTC.