Sponsored Content
Homework and Emergencies Homework & Coursework Questions help with the date difference Post 302502689 by DGPickett on Tuesday 8th of March 2011 03:41:37 PM
Old 03-08-2011
One technique I have used is to start time on March 1 of a leap year, so the future stretches out as 4 year sets, some with an extra day at the very end. When subtracting from a 4 year set the months in rotation, one never needs 29, as the most variable month is at the residue at the end after you subtract 47 months.

In UNIX, one usually just goes to UNIX time, subtracts, and then goes forward evaluating the residue, but if the app needs time in months, then it is more a question of the carry on subtract of dates, and of course the months, the leap year.

So, how close is your program -- what is a defect case?
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

date difference

Hi...I need some help with a date script. I need to allow the user to enter the month (alpha) day (int) and year (YYYY) and count the difference in number of days since Jan 1, 1952 to the users date. I've been messing with this for about 10 hours and I think I'm just making the script worse =( ... (1 Reply)
Discussion started by: mtnbaby
1 Replies

2. UNIX for Dummies Questions & Answers

date difference

Hi Can any buddy give mi a simple program or logic or command which will get difference between two dates ex:diff between 20051008 2005908 is 24hours 12 min 2 sec regards (1 Reply)
Discussion started by: rajuMBT
1 Replies

3. Shell Programming and Scripting

date difference

if there are two date one is entered by user and another is system date than how can we finds day difference between these two date try to make it within 4 lines (2 Replies)
Discussion started by: piyush_movadiya
2 Replies

4. Linux

date difference

hi, i have 2 dates in the form: '20080315120030' and '20080310140030'. i.e. YYYYMMDDHHMMSS. i need a way of getting the difference between them using shell script. any thoughts? (14 Replies)
Discussion started by: muay_tb
14 Replies

5. Shell Programming and Scripting

difference in date

Hi All! I would like to know the time difference between two dates which are in same format... $ date -r abc Thu Oct 29 09:40:37 EDT 2009 $ date Fri Oct 30 02:07:03 EDT 2009 i would like to find the diff between these two dates in hours..please help..:) Regards, Kiran (3 Replies)
Discussion started by: dddkiran
3 Replies

6. Shell Programming and Scripting

Difference in date

Dear all, I fancy that I'm pretty competent in ksh, but I have someone on HP-UX wanting me to script up a simple interface to handle user alterations rather than giving them high privileges to run up SAM. This is all fairly straightforward, but I'm stuck on an epoch date issue. When we have... (6 Replies)
Discussion started by: rbatte1
6 Replies

7. Programming

Date difference

I tried the below code to find difference between two dates. It works fine if the day of the month is 2-digit number. But it fails when we have a single-digit day of month(ex:1-9). my code is as below. please help me soon. #!/usr/bin/perl -w use strict; use Time::Local; ... (2 Replies)
Discussion started by: anandrec
2 Replies

8. Shell Programming and Scripting

Date difference

HI All , i need a bash script to find the number of days between two dates . Format YYYY-MM-DD THanks, Neil (1 Reply)
Discussion started by: nevil
1 Replies

9. AIX

Time Difference between date and date -u

Hi Everyone, We are having an issue with date and date -u in our AIX Systems. We have checked environment variable TZ and /etc/environment and however, we could not rectify the difference. >date Thu Mar 19 22:31:40 IST 2015 >date -u Thu Mar 19 17:01:44 GMT 2015 Any clue... (5 Replies)
Discussion started by: madhav.kunapa
5 Replies

10. Shell Programming and Scripting

Difference between two date

Hi, I created a script for finding the duration of a job using the start and end time of the job. But the command doesnt calculate correct value if the duration is more than 24 hours. Any help would be really good . cat test1 --- start time 03/27/15 17:41:00 03/24/15 11:58:04 03/23/15... (3 Replies)
Discussion started by: rogerben
3 Replies
XCALPR(1)						      General Commands Manual							 XCALPR(1)

NAME
xcalpr - print xcal calendar entries SYNTAX
xcalpr [ -c ][ -x ][ -f file ][ -d dir ][ -u user ][ date-spec ] DESCRIPTION
Xcalpr prints the contents of the xcal files. It is intended to be used in situations when you have no access to an X screen. It can also be used to generate entries for the standard UNIX calendar program. With no arguments, it prints any entries that exist for the next seven days. The program also reads the contents of the seven daily files and prints them at the appropriate point in the output stream. Each line in the output is preceded by the day of the week, the day of the month, the month and the year. Xcalpr can be given a date specification to select months and years. If the date spec consists of just a year number, then all the data for that year is printed. For example: xcalpr 1994 will print all the data for 1994. Several years can be specified. If you give the name of a month, then the data for that month in the current year will be printed. If the month is in the past, then the data for that month next year will be printed. For example, if xcalpr oct jan is typed in August, xcalpr will print October in the current year and January next year. You can select a particular year by adding the number after any months that you need printing: xcalpr oct nov 1994 will print October and November in 1994. There are a couple of special `month' names. The name rest will print the data for the rest of the month, starting tomorrow. The rest argument is not recognised if you give a year as a parameter. If tomorrow happens to be the first day of the next month, then all the data for next month will be printed. The name next prints all the data for next month. OPTIONS
The -c option causes xcalpr to output lines suitable for input to the standard UNIX calendar program. The -d switch is followed by a directory name and specifies an alterative location for your Calendar directory. Your home directory is prepended if the name doesn't start with a slash or a dot. The -f option is followed by a file name and xcalpr will write it's output to that file, rather than standard output. The -u option is followed by a user name and dumps their calendar files rather than yours. The -x option makes xcalev operate with Calendar files that are compatible with the xcalendar program. FILES
$HOME/Calendar/* xc<dd><Mon><Year> A data file is day, Month in three letter format and the year. xy<Year> A year directory. xw<Day> A data file for the weekly code, one per day. SEE ALSO
xcal(1), xcalev(1), xcal_cal(1) AUTHOR
Copyright 1993 by Peter Collinson, Hillside Systems All rights reserved. This product includes software developed by the University of California, Berkeley and its contributors. X Version 11 R5 October 1993 XCALPR(1)
All times are GMT -4. The time now is 03:51 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy