HTML <time> datetime Attribute

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

Meaning

The datetime attribute is used to indicate the date and time of the enclosed content.

The value of the attribute is a date in a special format as defined by ISO 8601.

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

<time datetime="YYYY-MM-DDThh:mm:ssTZD|PTDHMS">...</time>

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

Value

Description

YYYY-MM-DDThh:mm:ssTZD
PTDHMS

Date and time of when the text was deleted.