The DateTime.MinValue is converted into 0001-01-01 08:05:43 in Javascript

The server side is in C# and it returns object array list as json format. There is one field in the object model, it is DateTime type, and its value is DateTime.MinValue.

While in the page side, it receives /Date(-62135596800000)/ in string. I guess this is because of the object is serialized. And in javascirpt, I try to convert it back to Date type.

var timeSpan = element.DateModify.replace('Date','').replace('(','').replace(')','').replace(///g,'');
console.log(timeSpan);
var d = new Date(parseInt(timeSpan));
console.log(d);

When converted to Date in javascript, its value is 0001-01-01 08:05:43, not 0001-01-01 00:00:00. Why is it?

Answer

DateTime.MinValue is 0001-01-01 00:00:00 UTC. And that is indeed 0001-01-01 08:05:43 in your local time zone (whatever that may be, probably Asia/Shanghai or somewhere near that). When you console.log a Date, it displays the date in your local time zone. The Date value is correct. It’s just displayed in a different format.

The extra 5 minutes and 43 seconds is because at the year AD 1, time zones have not been standardised, and the local mean time offset from UTC at your location is +08:05:43.

Two simple ways to make it display the UTC time of 00:00:00 is to call toISOString or toUTCString:

console.log(new Date(-62135596800000).toISOString());
console.log(new Date(-62135596800000).toUTCString());