MediaWiki:Apihelp-protect-param-expiry
MediaWiki interface page
Expiry timestamps. If only one timestamp is set, it'll be used for all protections. Use infinite, indefinite, infinity, or never, for a never-expiring protection.
Expiry timestamps. If only one timestamp is set, it'll be used for all protections. Use infinite, indefinite, infinity, or never, for a never-expiring protection.