Kata

If the first day of the month is a Friday, it is likely that the month will have an Extended Weekend. That is, it could have five Fridays, five Saturdays and five Sundays.

In this Kata, you will be given a start year and an end year. Your task will be to find months that have extended weekends and return:

- The first and last month in the range that has an extended weekend
- The number of months that have extended weekends in the range, inclusive of start year and end year.

For example:

solve(2016,2020) = ("Jan","May",5). #The months are: Jan 2016, Jul 2016, Dec 2017, Mar 2019, May 2020

solve 2016 2020  = ("Jan","May",5). -- The months are: Jan 2016, Jul 2016, Dec 2017, Mar 2019, May 2020

solve(2016,2020) = ["Jan","May",5]. #The months are: Jan 2016, Jul 2016, Dec 2017, Mar 2019, May 2020

solve(2016,2020) = ["Jan","May",5]. //The months are: Jan 2016, Jul 2016, Dec 2017, Mar 2019 and May 2020

solve(2016,2020) = ["JANUARY","MAY","5"]. //The months are: Jan 2016, Jul 2016, Dec 2017, Mar 2019 and May 2020

solve(2016,2020) = ["Jan","May","5"]. //The months are: Jan 2016, Jul 2016, Dec 2017, Mar 2019 and May 2020

More examples in test cases. Good luck!

If you found this Kata easy, please try myjinxin2015 challenge version here