[Vuejs]-Issue in showing background color to specific days in calendar, working fine on all browsers except mobile Safari

You can try the following, which should work in all browsers:

.booked_event{
        background-color: rgb(223,6,167) !important; //  background for old browsers
        background-color: rgba(223,6,167,0.3) !important;  //Modern Browser, Will be ignored by old browsers

    }