Remove incorrect docmentation.
Add IRS link.
Add class-level comment.
Stub creation methods.
Implement getters.
Stub resolvePreviousValid, redirect resolvePrevious.
Add with(...) methods.
Add plus/minus methods.
Add atTime(...)
Stub toEpochDay
Implement until(...) methods.
Override lengthOfYearInMonths.
Finish override for resolvePreviousValid.
Implement create
Extract and implement lengthOfMonth()
Add dividers and other missing default documentation.
Implement AccountingDate.of
Implement getDayOfYear()
Implement getDayOfYear()
implement rangeAlignedWeekOfMonth()