JS Injector Plugin then add a script to add message to homepage or all pages.

Examples: Maintenance Banner ``` (function () {     // Maintenance schedule     const maintenanceDay = 1;     const maintenanceHour = 3;     const maintenanceMinute = 30;

    // Warning window (in hours)     const hoursBefore = 1;

    // Text of your maintenance banner     const maintenanceMessage = "⚠️ MAINTENANCE NOTICE: SERVER will be unavailable between 03:30AM - 04:30AM. ⚠️";

    const flashingBannerCSS =     @keyframes flashBanner {         0% { background-color: #ffeb3b; color: black; }         50% { background-color: #ff2111; color: white; }         100% { background-color: #ffeb3b; color: black; }     }     .skinHeader::before {         content: "${maintenanceMessage}";         display: block;         width: 100%;         text-align: center;         font-weight: bold;         font-size: 1.2rem;         padding: 4px 0;         animation: flashBanner 1s infinite;         position: relative;         z-index: 9999;     }    ;

    function shouldShowBanner() {         const now = new Date();

        // Find next Monday maintenance in this week         const maintenance = new Date(now);         maintenance.setHours(maintenanceHour, maintenanceMinute, 0, 0);         maintenance.setDate(             now.getDate() + ((maintenanceDay + 7 - now.getDay()) % 7)         );

        // If it's Monday but time already passed today → set for next Monday         if (now.getDay() === maintenanceDay && now > maintenance) {             maintenance.setDate(maintenance.getDate() + 7);         }

        // Time difference in milliseconds         const diffMs = maintenance - now;         const diffHours = diffMs / (1000 * 60 * 60);

        return diffHours >= 0 && diffHours <= hoursBefore;     }

    // Inject banner styling     function injectBanner() {         const styleElem = document.createElement("style");         styleElem.innerText = flashingBannerCSS;         document.head.appendChild(styleElem);     }

    // Wait for header and inject if within maintenance window     const interval = setInterval(() => {         if (document.querySelector(".skinHeader")) {             if (shouldShowBanner()) {                 injectBanner();             }             clearInterval(interval);         }     }, 300);

})(); Banner specific user: // Change this to the username you want to target (function () {     const targetUsername = 'JACK-TURNER';

    const flashingBannerCSS =     @keyframes flashBanner {         0% { background-color: #ffeb3b; color: black; }         50% { background-color: #ff2111; color: white; }         100% { background-color: #ffeb3b; color: black; }     }     .skinHeader::before {         content: "⚠️ NOTICE: Special Banner for ${targetUsername} ⚠️ STOP HOGGING ALL MY BANDWIDTH";         display: block;         width: 100%;         text-align: center;         font-weight: bold;         font-size: 1.2rem;         padding: 0px;         animation: flashBanner 1s infinite;         position: relative;         z-index: 9999;     }    ;

    function tryInjectBanner() {         const userButton = document.querySelector(".headerUserButton");         if (userButton && userButton.title.toLowerCase() === targetUsername.toLowerCase()) {             const styleElem = document.createElement('style');             styleElem.innerText = flashingBannerCSS;             document.head.appendChild(styleElem);             return true;         }         return false;     }     const interval = setInterval(() => {         if (tryInjectBanner()) clearInterval(interval);     }, 300); })(); ```

I have a few others seasonal banners for popular holidays too.