table.calendar{
    width: 100%;
    margin-top: 30px;
}

table.calendar th, table.calendar td{
    padding: 32px;
    background-color: #FFF;
    text-align: center;
    border: 1px solid #CCC;
    font-size: 36px;
}

/* 行の最初のtdは日曜日なため赤く */
table.calendar th:first-of-type, table.calendar td:first-of-type{
    background-color: #ffefef;
    color: #FF0000;
    font-weight: bold;
}

/* 行の最後のtdは土曜日なため青く */
table.calendar th:last-of-type, table.calendar td:last-of-type{
    background-color: #ededff;
    color: #0000FF;
    font-weight: bold;
}

/* 今日の日付 */
table.calendar td.today{
    background-color: #fbffa3;
    font-weight: bold;
}