Specifies the creation date of the page. This creates a
`<meta name="date" content="...">` header in the HTML output, but also
- modifies the internal `ctime` in the [[internal index|tips/inside_dot_ikiwiki/]].
+ modifies the internal `ctime` in the
+ [[!iki tips/inside_dot_ikiwiki desc="internal index"]].
The date can be entered in nearly any format, since it's parsed by
[[!cpan TimeDate]] but invalid dates yield an error in 3.20180321
or later.