Challenge #126: Fill in the [Date] Gaps

[lley124]

Here is my solution. 

[RebekaMazuchova]

:)

[mattnason1]

Tough one for me.  Had to think a bit on how to create a complete list.

Also had to update start date to 2017 and not 2018.  Finally ended at max date on input file as current date would add an extra 7 years of data. :)  Which left me 5 days short from the solution.