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HTML <ins> datetime Attribute

The datetime attribute on a <ins> tag attaches an insertion datetime.

This value is not visible, but it is machine-readable.

Example

#

An <ins> element with a datetime attribute.
The datetime value signifies when the insertion occurred.

HTTP stands for Hypertext Translate Transfer Protocol. 

<p>
  HTTP stands for Hypertext 
  <del>Translate</del> 
  <ins datetime="2020-10-02T08:11:08Z">Transfer</ins> 
  Protocol.
</p>

Using datetime

The datetime attribute attaches a date (required) and time (optional) value to an ins element.

Its value is not visible to the user; it only adds a semantic timestamp to the element.

The datetime values are readable by screen readers, search engines, JavaScript code, and others.

Syntax

<ins datetime="YYYY-MM-DDThh:mm:ssTZD">

Values

#

VALUE: YYYY-MM-DDThh:mm:ssTZD
DESCRIPTION: The date and time attached to the element.
The format can be broken down as follows:
  • YYYY - year (e.g. 2020)
  • MM - month (e.g. 09 for September)
  • DD - day (e.g. 01 for first day of the month)
  • T or space - a date and time separator, required if date is included
  • hh - hour in 24-hour format (e.g. 23)
  • mm - minutes
  • ss - seconds
  • TZD - Time zone designator where Z refers to Zulu or GMT
  • P - prefix for period (duration)
  • D - prefix for days
  • H - prefix for hours
  • M - prefix for minutes
  • S - prefix for seconds
EXAMPLES: local time
2021-01-18 11:54:41.809
international time
2021-01-18 18:54:41.809Z
duration
PD18H23M40

Browser support

Here is when datetime support started for each browser:

Chrome
 1.0 Sep 2008
Firefox
 1.0 Sep 2002
IE/Edge
 1.0 Aug 1995
Opera
 1.0 Jan 2006
Safari
 1.0 Jan 2003

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