HTML <del> Tag with the 'datetime' Attribute
<p>Only <del datetime="2015-05-10T06:23-07:33">$300</del> <ins>$800</ins> for a limited time only!</p>
The above example demonstrates usage of the datetime attribute of the
<del> element. This (optional) attribute is used to specify the time and date of the change.
del element represents a removal from the document. This could be used in the case of crossing off items in a "to do" list, deleting an item and inserting new text in its place (using the
<ins> element), etc.
<del> element also accepts the
cite for providing the URL of a document that explains the change.