Question

Which year matched the calendar of 2007?

Hint:

Two years have the same calendar if they are both leap or both non-leap years and start on the same weekday.

Answer 1

Step 1: Identify the type of year.
The year 2007 was a non-leap year that started on a Monday.
Step 2: Use the calendar repetition rule.
For non-leap years, the same calendar repeats after 11 years, then 11 years, then 6 years, depending on leap years in between.
Step 3: Apply the rule.
Adding 11 years to 2007 gives:
\[ 2007 + 11 = 2018 \]
The year 2018 was also a non-leap year starting on Monday.
Step 4: Conclusion.
Thus, the calendar of 2007 matches the calendar of 2018.