HTML datetime Attribute

❮ HTML Attributes


<p>This text has been <del datetime="2020-01-01T01:01:01Z">deleted</del>.</p>


The date and time the deletion, insertion or enclosed content was made.

Valid datetime Values:

Possible Values
a valid year string 2011
a valid month string 2011-11
a valid date string 2011-11-18
a valid yearless date string 11-18
a valid week string 2011-W47
a valid time string
  • 14:54
  • 14:54:39
  • 14:54:39.929
a valid local date and time string
  • 2011-11-18T14:54:39.929
  • 2011-11-18 14:54:39.929
a valid global date and time string
  • 2011-11-18T14:54:39.929Z
  • 2011-11-18T14:54:39.929-0400
  • 2011-11-18T14:54:39.929-04:00
  • 2011-11-18 14:54:39.929Z
  • 2011-11-18 14:54:39.929-0400
  • 2011-11-18 14:54:39.929-04:00
a valid duration string PT4H18M3S

Standard Syntax

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

Browser Support


Applies to:

The datetime attribute can be used on the following element:

Element Attribute
<del> datetime
<ins> datetime
<time> datetime

Attribute Values

Value Description
YYYY-MM-DDThh:mm:ssTZD Date and time of when the text was deleted.


  • YYYY: four-digit year such as 1997
  • MM: two-digit month (01=January, 02=February, and so on.)
  • DD: two-digit day of the month (01,02, and so on.)
  • hh: two-digit hour (00 to 23) (24-hour clock, not AM or PM)
  • mm: two-digit minute (00 to 59)
  • ss: two-digit second (00 to 59)
  • TZD: time zone designator (Z denotes Zulu)

More Examples


<p>Cost of the product has been increased <ins cite="" date="2021-01-01T00:00:00-00:00">New rates will be effected January 2021 onwards.</ins></p>


<p>The program starts at <time datetime="2021-01-01T01:00:00">01:00</time>.</p>
❮ HTML Attributes