#calendar tbody td span,
#calendar tbody td a {
    height: 36px!important;
    width:36px!important;
    max-height: 36px!important;
    max-width:36px!important;
    line-height:28px;
}

#calendar tbody td .ui-state-default{
    text-align: center;
    border-radius: 30px;
}
#calendar

#calendar tbody td .ui-state-default.range {
    border-radius:0;
}