<p>Yes you can. At least when CIP announce a new outfit they say you can use it any time you want.</p><blockquote><p>Once <blockquote><p>Once bought, your character can wear this outfit anytime. The outfit is purely cosmetic and does not bestow any benefits.</p></blockquote><p>Source: <a rel="nofollow" href="https://www.tibiaroyal.com/en/blog/511/new-outfit/">TibiaRoyal</a></p>benefits.</p></blockquote><p>My source used to be Tibia Royal but the link doesn't work anymore due to fansite being inactive but this is something I've known in-game.</p>