I am trying to do this:

string thisReturn = "";

DateTime now = DateTime.UtcNow;
now = new DateTime (now.Year, 1, 1);
int yearDay = (int)(now.Subtract (new DateTime (1970, 1, 1))).TotalSeconds;
thisReturn = yearDay + "000";

Which will return this: 1451606400000

---

EDIT

I have now done this:

var unix = Math.round(+new Date()/1000);
var timestamp = unix+"000";

This will return this: 1480661530000

Almost there, but how do I set it to the 1st of january current year?

---

Now, how do I do exactly the same in javascript?

Hoping for help and thanks in advance :-)

I am trying to do this:

string thisReturn = "";

DateTime now = DateTime.UtcNow;
now = new DateTime (now.Year, 1, 1);
int yearDay = (int)(now.Subtract (new DateTime (1970, 1, 1))).TotalSeconds;
thisReturn = yearDay + "000";

Which will return this: 1451606400000

---

EDIT

I have now done this:

var unix = Math.round(+new Date()/1000);
var timestamp = unix+"000";

This will return this: 1480661530000

Almost there, but how do I set it to the 1st of january current year?

---

Now, how do I do exactly the same in javascript?

Hoping for help and thanks in advance :-)

• javascript
• c#
• date
• timestamp

Share Improve this question Follow edited Dec 2, 2016 at 6:55 Mansa asked Dec 2, 2016 at 6:41 MansaMansa 2,3251111 gold badges3939 silver badges6969 bronze badges 5

• Possible duplicate of How do you get a timestamp in JavaScript? – Mohit S Commented Dec 2, 2016 at 6:45
• you can do var time = new Date().getTime(); – bash0ne Commented Dec 2, 2016 at 6:49
• in JavaScript Date.prototype.getTime() returns the number of milliseconds since 1 January 1970 – Jesús López Commented Dec 2, 2016 at 6:49
• OK, I almost got it (read edited) but i need it to set the timestamp for the beginning of the year. How do I do that? – Mansa Commented Dec 2, 2016 at 6:56
• Mansa the answer you selected is not correct. I strongly encourage you to look at the output it produces since it isn't in UTC and therefore isn't patible with your C# code. – Ralph Ritoch Commented Dec 2, 2016 at 7:40

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3 Answers 3

Sorted by: Reset to default 3

You can just do the same in javascript

    var d = new Date();
    var n = d.getTime();

Ofcause you can add some parameters for new Date()

The following will get you the timestamp for the beginning of the year.  

thisReturn = (function(d) { 
    d.setUTCMilliseconds(0);
    d.setUTCSeconds(0);
    d.setUTCMinutes(0);
    d.setUTCHours(0);
    d.setUTCMonth(0);
    d.setUTCDate(1); 
  return + d; })(new Date()); 

To get the timestamp in seconds, you can use:

Math.floor(Date.now() / 1000)

Or alternatively you could use:

Date.now() / 1000 | 0

Please let me know if its worked for you.

Thanks!