Notice the day on which July 15 falls in your calendar. Now find out what day is August 15? September 15? October 15? What pattern do you notice? Share in grade. Now choose a date and look up the day on which it falls. Challenge your friends to guess what day will the same date fall in the following month.
Pattern Observed: The same date in consecutive months shifts forward by 2-3 days.
Reason: Months have different numbers of days (28, 30, or 31).
Example: If July 15 is Monday, August 15 would be Thursday. (3 days forward because July has 31 days)
Rule:
- A month with 31 days causes a shift of 3 days.
- A month with 30 days causes a shift of 2 days.
Explanation
The chapter encourages students to observe patterns in calendar dates. When the same date (like 15th) is tracked across months, the day of the week shifts based on how many days are in each month. A month with 31 days causes a shift of 3 days, while a month with 30 days causes a shift of 2 days.
Solution Steps
Observe the day of the week for a specific date in one month.
Look up the same date in the following month.
Count how many days forward the day of the week has shifted.
Compare the shift to the number of days in the first month.
A 31-day month causes a 3-day shift; a 30-day month causes a 2-day shift.