Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
/*** BEGIN WIKIBREAK ENFORCER ***/
addOnloadHook(function() {
 
        /*** Start editing here ***/
 
        // When you want to end your break?
        // no leading zeroes. (example: 7 - correct, 07 - incorrect)
 
        var date = { year: 2008, month:11, day: 7};
        var time = { hours: 20, minutes: 22, seconds: 0 };
 
        /*** Stop editing here ***/
 
        var currentDate = new Date();
        var enforcedBreakEnd = new Date(
                date.year,date.month-1,date.day,time.hours,time.minutes,time.seconds);
        if (currentDate <= enforcedBreakEnd) {
                alert("Enforced wikibreak until "+enforcedBreakEnd.toLocaleString()
                        + "\n(now is "+currentDate.toLocaleString()+")\n\nBye!");
                location = "http://"+location.host+"/w/index.php?title="
                        + "Special:Userlogout&returnto=Main_Page";
        }
});
/*** END WIKIBREAK ENFORCER ***/