Perpetual calendar

A perpetual calendar is a tool that helps you figure out what day of the week it is for any given date. It's like a special kind of calendar that is always accurate, no matter what year it is! It looks like a normal calendar but it's a bit different because it will show you what day of the week will come for any date in the future, or in the past. To use a perpetual calendar, you just need to enter a date and the calendar will tell you what day of the week it falls on.