Translate date value to normal date and backwards.

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# 1  
Old 12-05-2003
Question Translate date value to normal date and backwards.


How do i translate datevalues in unix to normal dates.
and how do i translate normal dates in to datevalues.

I'm using the unix-date.


1067949360 to 4-11-03 12:36
4-11-03 12:36 to 1067949360

I want to built a script with a question to the user: give in date
the input will be 4-11-03 . I have to translate it to 1067940000 and run a script.
Afther that i'll want to print a rapport.
Quest what ??
A translation from 1067949360 to 4-11-03 12:36


Sorry for the bad englisch (just someone from holland)Smilie
# 2  
Old 12-06-2003
Here's one I wrote a while ago. Converts epoch<->date.

/* convert time values:  epoch<->human readable  -- some code borrowed from comp.unix.programmer

#include <time.h>
#include <ctype.h>
#include <stdio.h>

int main(int argc, char *argv[])
        int i;
        time_t time, time_since_epoch;
        int month_nr, hours, minutes, seconds, year;
        struct tm time_str;
        char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                           "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };

        if (argc > 7 || argc < 2) {
        for(i=0;i<strlen(argv[1]);i++) {
                if(!isdigit(argv[1][i])) {
                        break;  /* any non-digits means its string->epoch */
                } else {  /* epoch->string */
                        time = atol(argv[1]);
                        printf("%s\n", ctime(&time));

        month_nr = -1;
        for (i = 0; i <= 11; i++)
             if (strcmp(months[i], argv[2]) == 0) {
                        month_nr = i;

        if (month_nr == -1) {
                printf("\n\nERROR: Read in non-month string \"%s\", when\n");
                printf("       expected to get a month string such as \"Dec\".\n\n", &argv[2]);

        time_str.tm_mon  = month_nr;
        time_str.tm_mday = atoi(argv[3]);
        /* argv[4] is a string with the format  hh:mm:ss  E.g.  21:05:32 */
        sscanf(argv[4], "%d:%d:%d",
                          &time_str.tm_hour, &time_str.tm_min, &time_str.tm_sec);

        /* We don't use argv[5], the time zone.  E.g. "EDT" */
        year = atoi(argv[6]);
        if ( (year < 1900) || (year > 2038) ) {
                year -= 1900;

        /* "year" should now contain the nr. of years since 1900 !  E.g. 95 */
        time_str.tm_year = year;

        /* Don't know if daylight savings time is in effect or not.  By setting
         *    this variable to -1, 'mktime()' will figure it out and adjust for it. */

        time_str.tm_isdst = -1;
        time_since_epoch = mktime(&time_str);
        if ( time_since_epoch == -1) {
                printf("\nThe calendar time cannot be represented\n\n");

        printf("The time_since_epoch is %d sec.\n\n", time_since_epoch);

print_usage(char *program_name)
        printf("\nUsage: %s day_of_week month_name month_date, time_string time_zone year\n", program_name);
        printf("   or: %s epoch\n",program_name);
        printf(" Ex: %s Thu Oct  9 14:38:46 PDT 2003\n\n",program_name);

# 3  
Old 12-08-2003
#! /usr/bin/perl -w
use Time::Local;
#4-11-03 12:36 ### use this date and time for example

$time = timelocal($sec,$min,$hour,$mday,$mon,$year);
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($time);
print "DATE:$sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst\n";
print "TIME: $time\n";
"" 73 lines, 1946 characters
TIME: 1070649360

# 4  
Old 12-10-2003
You can also use Python to do the conversion as
shown in the following example.

- Finnbarr

import os, sys, datetime
import time

usage = "Usage: %s [s | d] value" %os.path.basename(sys.argv[0])

mode = sys.argv[1]
value = sys.argv[2]
except IndexError:
print usage;

if (mode != "s" and mode != "d"):
print usage;

if (mode == "s"):
fpm=time.strptime(value, "%d-%m-%y %H:%M")
print "Date --> Epoch: ", int(time.mktime(fpm))
print "Epoch --> Date: ", datetime.datetime.fromtimestamp(float(value)).strftime("%d-%m-%y %H:%M")
# 5  
Old 12-10-2003
Thanks a lot for de codes.
In all the codes where usefull parts.
my script is working.

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