/* sundays */
#calendar-body div:nth-child(1),
#calendar-body div:nth-child(8),
#calendar-body div:nth-child(15),
#calendar-body div:nth-child(22),
#calendar-body div:nth-child(29),
#calendar-body div:nth-child(36)
 {
  background-color: #dbe4ff;
}
/* satterdays */
#calendar-body div:nth-child(7),
#calendar-body div:nth-child(14),
#calendar-body div:nth-child(21),
#calendar-body div:nth-child(28),
#calendar-body div:nth-child(35),
#calendar-body div:nth-child(42)
 {
  background-color: #ecf1ff;
}