Days, dates, and the patterns of time
August 15, 1947 is the date India became independent. What day of the week was it?
In any given calendar year, what is the maximum number of Friday the 13ths that can occur? What is the minimum?
Was the year 1900 a leap year? Why or why not?
If you've just turned 30 years old, roughly how many days have you been alive?
You have a 2026 wall calendar. After this year, what is the next year whose calendar will be identical (same days of the week for every date)?