4 ms·

I still am not. Could you explain?

• laszlokorte 7y ago
  2d lookup table for (month,day) -> weekday
• knolax 7y ago
  To find the current day of the week, look at the row corresponding to the day of the month and the column corresponding to the month. There's a typo for the days 18-21 where there's two 18s.