table, tr, th, td { border: 1px solid black; }
.day_row:nth-child(7n+2) { background-color: yellow; }
.district_name { writing-mode: vertical-rl; transform: rotate(180deg); }
table, tr, th, td { border: 1px solid black; }
.day_row:nth-child(7n+2) { background-color: yellow; }
.district_name { writing-mode: vertical-rl; transform: rotate(180deg); }