@bkeyport the only code that sets the highlighting is
starting at line 82
so, I would change the css to unique colors for the 3 lines, (2 have different classes but same color)
if (currentWeekday.day() == 0 || currentWeekday.day() == 6) { output += "<div class='current_day_weekend'>" + currentWeekday.format("D") + "</div>"; } else { output += "<div class='current_day'>" + currentWeekday.format("D") + "</div>"; } } else { output += "<div class='current_day'>" + currentWeekday.format("D") + "</div>"; if (currentWeekday.day() == 0 || currentWeekday.day() == 6) { output += "<div class='current_day_weekend'>" + currentWeekday.format("D") + "</div>"; } else { output += "<div class='current_day'>" + currentWeekday.format("D") + "</div>"; } } else { output += "<div class='current_day'>" + currentWeekday.format("D") + "</div>";