Refactor schedules to use simpler

* [X] Refactor holidays to use simpler.
* [X] Refactor street sweeping to use simpler.
* [X] Refactor schedules to use simpler.
* [ ] Add tests for street sweeping, holidays, and schedules tasks (Done but commented out, see #27)

Oh! Turns out it I left it in there for a reason, that variable needs to be instantiated.