spiral_calendar/css/index.css

/* body {
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    display: block;
}

#canvas {
    margin: 0;
    width: 100%;
    height: 100%;
    display: block;
} */

* { margin: 0; padding: 0;}

body, html { height:100%; }

#canvas {
    position:absolute;
    width:100%;
    height:100%;
}