date - -1 Hour timestamp in Javascript - Stack Overflow

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i have the following timestamp : 1445086800

I want to do - 1 hour on this timestamp. What is the best way to do this in javascript? The output needs to be a unix timestamp also.

Is there something like a strtotime() in javascript function?

Thanks.

i have the following timestamp : 1445086800

I want to do - 1 hour on this timestamp. What is the best way to do this in javascript? The output needs to be a unix timestamp also.

Is there something like a strtotime() in javascript function?

Thanks.

• javascript
• date

Share Improve this question Follow asked Jun 6, 2016 at 16:43 Thomas CrawfordThomas Crawford 89622 gold badges1515 silver badges4646 bronze badges 10

• 1 Please post your code to show us how you have already tried to solve this, and explain what was wrong with it. – Reinstate Monica Cellio Commented Jun 6, 2016 at 16:44
• Just substract a hour: ts - 3600e3 – vp_arth Commented Jun 6, 2016 at 16:45
• Re: strtotime(), you can use Date.parse(). Just remember that JavaScript's Date.parse() returns milliseconds, where PHP's strtotime() returns seconds, so Date.parse("Jan 1, 2016") returns 1451624400000, where strtotime("Jan 1, 2016") returns 1451606400. – jpec Commented Jun 6, 2016 at 17:18
• @jpec—no, do not do that. Date.parse expects a string, not a number, and it's implementation dependent so while the result should be an invalid date (since 1445086800 will converted to a string and interpreted as a year that is beyond the max year for javascript dates of 287396), it might be anything. – RobG Commented Jun 7, 2016 at 6:03
• @RobG The question was, "Is there something like strototime() in javascript?", and the answer is "yes", there is. It does expect a string, just like strtotime() does. Implementation may vary, however for mon date / time string formats, I'm getting consistent results in all major browsers, and back to IE 5. – jpec Commented Jun 7, 2016 at 16:52

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2 Answers 2

Sorted by: Reset to default 10

Just do this

timestamp = timestamp - 3600 

you have to subtract 3600 seconds to the timestamp var If your timestamp is in milliseconds multiply by 1000 the 3600 to get in seconds

Unix timestamps are counted in seconds. Thus, to substract 1 hour:

timestamp -= 3600; // 60 seconds * 60 minutes

Your new timestemp will be:

1445083200

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