What is the proper way to create a timestamp in javascript with date string?

Question

I have date format returned as 05-Jan, 12-feb etc.. when i convert current date using date object in javascript . I did something like this

            var curr = new Date(),
            curr_year = curr.getFullYear(),
            curr_month = curr.getMonth(),
            curr_day = curr.getDay(),
            today = new Date(curr_year, curr_month, curr_day, 0, 0, 0, 0);
            console.log(today);

Here the today is returned as invalid date i needed the create a timestamp which should not include minutes secs and millisecs as zero for date comparison of month and date alone based on that i can categories .Is there way to dynamically create a date and compare those dates for given format. And when i try to convert my date string using date object it returns year as 2001. how can i compare dates based upon current year. For eg: in php i have used mktime to create a date dynamically from given date format and compare those results. Any suggestion would be helpful. Thanks.

So if you fix the typo the date isn't invalid anymore...if that's not what you want please make your question clearer. What are your expected input(s) and output? — nbrooks
– nbrooks, Commented Feb 4, 2013 at 11:23

nbrooks · Accepted Answer · 2013-02-04 11:33:36Z

1

You can leverage the native JS Date functionality to get human-readable date strings for time stamps.

var today = new Date();
console.log( today.toDateString() ); // Outputs "Mon Feb 04 2013"

Date comparison is also built in.

var yesterday = new Date();
yesterday.setDate( yesterday.getDate() - 1);
console.log( yesterday.toDateString() ); // Outputs "Sun Feb 03 2013"
console.log( yesterday < today ); //Outputs true

You can use the other built-in methods to fine-tune this comparison to be/not be sensitive to minutes/seconds, or to set all those to 0.

edited Feb 4, 2013 at 11:33

answered Feb 4, 2013 at 11:19

nbrooks

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5 Comments

Sathya Raj Over a year ago

sorry invalid date was a due to that error but the day returns as 01 bt today is 04 ..

nbrooks Over a year ago

@sathya Read the documentation. getDay Returns the day of the week (0-6) for the specified date according to local time. Today is Monday, the 1st day of the week, so it returned 1. If you want the date, use getDate.

Sathya Raj Over a year ago

i read the documentation and corrected those mistakes today = Date(curr_year, curr_month, curr_day, 0, 0, 0, 0); when print it still returns hours, minutes ,secs and milli secs of current time. if i needed to find birth day with my date format i.e 04-feb it will be equal at a sec only then it will return only greater or lesser.

Sathya Raj Over a year ago

@nbrroks srry my bad i missed new operator again .. Peace out

nbrooks Over a year ago

@sathya You can use the Date object's set methods to set the seconds etc. to 0, and wrap all those into a fn. you can call to normalize the date. Or, you can simply use string equality to compare the date string (which includes only the day and date, as shown in my answer above).

Tomas Nekvinda · Accepted Answer · 2013-02-04 11:21:02Z

0

You said that you used mktime() in php, so what about this?

answered Feb 4, 2013 at 11:21

Tomas Nekvinda

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2 Comments

Sathya Raj Over a year ago

i ll try it and get back to you

Sathya Raj Over a year ago

i tried but it didnt give correct timestamp today = mktime(0,0,0, curr_day, curr_month+1, curr_year)

Nimrod007 · Accepted Answer · 2013-02-04 11:21:20Z

0

change to this :

        var curr = new Date(),
        curr_year = curr.getFullYear(),
        curr_month = curr.getMonth()+1,
        curr_day = curr.getDay(),
        today = curr_month+'/'+curr_day+'/'+curr_year;
        console.log(today);

(getMonth()+1 is because January is 0)

change the :

           today = curr_month+'/'+curr_day+'/'+curr_year;

to whatever format you like.

answered Feb 4, 2013 at 11:21

Nimrod007

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2 Comments

Sathya Raj Over a year ago

i wanted to create a timstamp regardless of min or secs

Nimrod007 Over a year ago

this is example without min/sec

Sathya Raj · Accepted Answer · 2013-02-07 07:35:00Z

0

I have found a way to convert the date into timestamp i have tried as @nbrooks implemented but .toDateString has built in date comparison which works for operator < and > but not for == operator to do that i have used Date.parse(); function to achieve it. Here it goes..

 var curr = new Date(),
 curr_year = curr.getFullYear(),
 curr_month = curr.getMonth(),
 curr_day = curr.getDate(),
 today = new Date(curr_year, curr_month, curr_day, 0,0,0,0);
 var dob = new Date('dob with month and date only'+curr_year);
 if(Date.parse(dob) == Date.parse(today)){
        //Birthdays....
        }

This method can be used to create a timestamp for dynamically created date.Thanks for your suggestions.

answered Feb 7, 2013 at 7:35

Sathya Raj

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