/* 土日祝の色(日曜はじまり) */
span.flatpickr-weekday:nth-child(1) { color: rgba(255, 0, 0, 0.6); }
span.flatpickr-weekday:nth-child(7) { color: rgba(0, 0, 255, 0.6); }
.flatpickr-day.saturday { color: rgb(0, 0, 255); }
.flatpickr-day.sunday,
.flatpickr-day.jp-holiday { color: rgb(255, 0, 0); }
.flatpickr-day.flatpickr-disabled.saturday { color: rgba(0, 0, 255, 0.2); }
.flatpickr-day.flatpickr-disabled.sunday,
.flatpickr-day.flatpickr-disabled.jp-holiday { color: rgba(255, 0, 0, 0.2); }