message: CalendarHeader key duplicate
diff: @@ -59,9 +59,9 @@ export const CalendarHeader = ({
  <div className={classes.daysHeader}>
  {
  - utils.getWeekdays().map(day => (
  + utils.getWeekdays().map((day, i) => (
  <Typography
  - key={day}
  + key={`${day}-${i}`}
  variant="caption"
  className={classes.dayLabel}
  >
  