Month and year only formats identified as date and year formats

[Sushant-Sardeshpande]

Have a date which only had month and year components.
The date being sent either as 05-2019, 2019-05, 05/2019 or 2019/05
Identified as YYYY and DD instead of month. A month and year date is more common than a day and year date.

[gr2m]

If you like, see if you can fix the problem without adding too much logic. It seems like the same issue as #60