Возможно ли сделать смену картинок по дням недели?

Плохо разбираюсь в кодировке. Может кто подсказать возможно ли в моем коде сделать смену Item картинок по дням в течении месяца. Все что смотрел, искал в интернете, ничего не помогло.

тут идут Item объекты с ссылками на изображения (нужно сделать так, чтобы у каждого ITEM объекта менялась картинка каждый день в течении месяца, получается 31 ссылка)

<style>
#u79 { font-size: 1px; line-height: 0px;}
#item-1 {
background-image:url( assets/Residents/AbstractVision_10.png);
}
#item-2 {
background-image:url( assets/Residents/AbstractVision_11.png);
}
#item-3 {
background-image:url( assets/Residents/AbstractVision_12.png);
}
#item-4 {
background-image:url( assets/Residents/AbstractVision_13.png);
}
#item-5 {
background-image:url( assets/Residents/AbstractVision_14.png);
}
#item-6 {
background-image:url( assets/Residents/AbstractVision_15.png);
}
#item-7 {
background-image:url(assets/Residents/AbstractVision_16.png);
}
#item-8 {
background-image:url(assets/Residents/AbstractVision_17.png);
}
#item-9 {
background-image:url(assets/Residents/AbstractVision_18.png);
}
#item-10 {
background-image:url(assets/Residents/AbstractVision_19.png);
}
#item-11 {
background-image:url(assets/Residents/AbstractVision_20.png);
}
#item-12 {
background-image:url(assets/Residents/AbstractVision_21.png);
}
#item-13 {
background-image:url(assets/Residents/AbstractVision_22.png);
}
#item-14 {
background-image:url(assets/Residents/AbstractVision_23.png);
}
#item-15 {
background-image:url(assets/Residents/AbstractVision_00.png);
}
</style>

Дальше Описание объектов

<div class="grpelem"><!-- custom html -->
        <div id="carousel">
        <a href="#" id="img1"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-1"/></a>
            <a href="#" id="img2"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-2"/></a>
            <a href="#" id="img3"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-3"/></a>
            <a href="#" id="img4"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-4"/></a>
            <a href="#" id="img5"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-5"/></a>
            <a href="#" id="img6"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-6"/></a>
            <a href="#" id="img7"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-7"/></a>
            <a href="#" id="img8"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-8"/></a>
            <a href="#" id="img9"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-9"/></a>
            <a href="#" id="img10"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-10"/></a>
            <a href="#" id="img11"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-11"/></a>
            <a href="#" id="img12"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-12"/></a>
            <a href="#" id="img13"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-13"/></a>
            <a href="#" id="img14"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-14"/></a>
            <a href="#" id="img15"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100" hright="159" style="background-repeat: no-repeat; background-size:cover; background-position: center;" id="item-15"/></a>
    </div>

ниже уже сама анимация галереи и ссылки...