What type of date format is this and how to format it to human readable format?

Question

What type of date format is this ?

+57432-03-28T16:01:10Z

I've tried using plain Javascript, daysjs and moment but I always get 'Invalid Date'. Did someone encounter this?

Also, I've been unable to find the following date formats on the web.

Answer 1

Looks like you are in the year 57432 whilst we are in 2019. Jokes apart, Add a 0 and it shall work.

new Date('+057432-03-28T16:01:10Z')

The reason being, ECMAScript requires a 6 digit year in order to support its year expansion feature.

This link explains it: http://www.ecma-international.org/ecma-262/5.1/#sec-15.9.1.15

Edit (as @RobG pointed out):

This link has the latest details: http://ecma-international.org/ecma-262/10.0/#sec-expanded-years

Answer 2

It looks like new Date().toISOString() format,but missing 0 after +. try new Date('+057432-03-28T16:01:10Z')

Answer 3

It's ISO_8601

You could use JavaScript's Date object to parse this date string.

new Date();
new Date(value);
new Date(dateString);
new Date(year, monthIndex [, day [, hours [, minutes [, seconds [, milliseconds]]]]]);

Other answers have pointed out that the date string missed a 0 after '+' which causes the date string invalid.

let bad = '+57432-03-28T16:01:10Z' // invalid
let d1 = new Date(bad);// Invalid Date {}
let good = '+057432-03-28T16:01:10Z' // valid
let d2 = new Date(good); // ok

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