The Date general HTTP header contains the date and time at which the message was originated.

Warning: Date is listed in the forbidden header names in the fetch spec, so this code will not send the Date header:

fetch('', {
      'headers': {
        'Date': (new Date()).toUTCString()
Header type Request header, Response header
Forbidden header name yes


Date: <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMT



One of "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", or "Sun" (case-sensitive).


2 digit day number, e.g. "04" or "23".


One of "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" (case sensitive).


4 digit year number, e.g. "1990" or "2016".


2 digit hour number, e.g. "09" or "23".


2 digit minute number, e.g. "04" or "59".


2 digit second number, e.g. "04" or "59".


Greenwich Mean Time. HTTP dates are always expressed in GMT, never in local time.


Date: Wed, 21 Oct 2015 07:28:00 GMT
new Date().toUTCString()
// "Mon, 09 Mar 2020 08:13:24 GMT"


Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content (HTTP/1.1 Semantics and Content)

Browser compatibility

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See also