Board Thread:Support Requests - Designing Your Wikia/@comment-25758952-20160627162809/@comment-25744472-20160630145722

Maybe you have to check Custom signature. Insert  in the box and check the option 'I want to use wikitext in my signature'.

Btw, isn't it better to use four tildes? You know, it's always good to provide the time ;) It's up to you after all.