I think this kata will benefit from adding random test cases in addition to fixed tests. This should be easy to arrange, let me know if you need help with this.

The description states some variables are provided, but it is not quite clear what are those variables exactly. I suggest to clarify this like this:

• We have provided various variables to help make the program better to write these are:
  • Days of the week values (MONDAY = 0, TUESDAY = 1, WEDNESDAY = 2 etc...)
  • Months (JANUARY = 1, FEBRUARY = 2, MARCH = 3 etc...)

Rather than providing additional instructions as comments in Solution Setup, please move that info to Description.

There is not a single test case for leap years. Please add leap year cases.

Example Test Cases are empty. Please provide several test cases there.

Solution Setup names the function dayOfTheWeek, but the tests use dayOfWeek. This causes error. Please correct the Solution Setup.