The {{undated}} template is used to label undated comments in a conversation. However, dating of comments is not required except when using auto-archiving bots.
All parameters
{{subst:undated|date}}
Date
Datestamp for comment
Time and date of undated comments can be found on the history page.
Timezone adjustment
Note that talk page times should always be in UTC. If timezone offset in your preferences is not 00:00, you'll have to adjust the time taken from history page to UTC. For example:
your offset is -04:00
you copy "01:55, 26 August 2021" from history page
you put {{subst:undated|05:55, 26 August 2021 (UTC)}}
If this is too difficult to figure out, or you are in a hurry, then leave out the time, and only put in the date.
If you frequently use this template, or otherwise refer to UTC, you could consider setting your local time in the preferences to UTC.
Examples
With time
Typing {{subst:undated|01:55, 26 August 2021 (UTC)}} will yield:
— Preceding undated comment added 01:55, 26 August 2021 (UTC)
Without time
Typing {{subst:undated|26 August 2021}} will yield:
User information templates provide informational links for a user; they are similar to signatures, but often provide additional information, and may be used by other users. List:
Example(talk· contribs ·count· logs · page moves ·block log· block user · email · central auth · deleted contribs ·list user· global contribs ·target logs) With this template, you can specify which links you want displayed. The above example includes some of the available links.