MediaWiki:Common.js

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var today = new Date();
var month = today.getMonth() + 1;
var day = today.getDate();

var prankMonth = 10;
var prankDay = 12;

if (month === prankMonth && day === prankDay) {
    var pageName = mw.config.get('wgPageName');
    
    if (!pageName.startsWith('AF:')) {
        window.location.href = '/wiki/AF:' + pageName;
    }
}