.main__sidebar_left #calendar caption {
    text-align: center;
    font-size: 1.6rem;
    color: #000;
    font-weight: 600;
}

.main__sidebar_left #calendar td {
    border: 3px solid #fff;
}

.main__sidebar_left #calendar th#saturday,#calendar th#sunday {
    color: #525263;
}
.main__sidebar_left #calendar .holiday {
    background: #fcdcdc;
    color: #333;
    padding: 3px;
}