.box_calendar {
  position:absolute;
  top:1%;
  width: 98%;
  height:50%;
  border: 2px solid green;
}


.box_bottom_left {
    position: absolute;
    top: 53%;
    width: 50%;
    height: 42%;
    border: 2px solid green;
}

.box_bottom_right {
    position: absolute;
    right: 1%;
    top: 53%;
    width: 46%;
    height: 42%;
    border: 2px solid green;
}