@media only screen and (max-width : 480px) {
    #cal-week-box {
        font-size: 10px !important;
    }
    #cal-week-box {
        width: 40px !important;
        left: -41px;
    }
    .cal-month-box .cal-day-today span[data-cal-date] {
        font-size: 1.2em !important;
    }
}