Date header
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The HTTPDaterequest andresponse header contains the date and time at which the message originated.
| Header type | Request header,Response header |
|---|---|
| Forbidden request header | Yes |
Syntax
Date: <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMTDirectives
<day-name>One of
Mon,Tue,Wed,Thu,Fri,Sat, orSun(case-sensitive).<day>2 digit day number, e.g., "04" or "23".
<month>One of
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec(case sensitive).<year>4 digit year number, e.g., "1990" or "2016".
<hour>2 digit hour number, e.g., "09" or "23".
<minute>2 digit minute number, e.g., "04" or "59".
<second>2 digit second number, e.g., "04" or "59".
- GMT
Greenwich Mean Time. HTTP dates are always expressed in GMT, never in local time.
Examples
Response with a Date header
The following HTTP message is a successful200 status, with aDate header showing the time the message originated.Other headers are omitted for brevity:
HTTP/1.1 200Content-Type: text/htmlDate: Tue, 29 Oct 2024 16:56:32 GMT<html lang="en-US" …Attempting to set the field value in JavaScript
TheDate header is aForbidden request header, so this code cannot set the messageDate field:
fetch("https://httpbin.org/get", { headers: { Date: new Date().toUTCString(), },});Specifications
| Specification |
|---|
| HTTP Semantics # field.date |