In reply to jemostrom…
I’m also a fellow student. My understanding of the month portion is that if you were to ask someone “What month did X event happen?” and they just said “January” that may not be specific enough. A month is defined relative to its year, so “January of 2015” would make more sense. That’s what the month datatype represents.
This is comparable to the date datatype where if you asked someone “What day did X event happen?” and they just said “30” you would probably need more information, like the relative month and year so “The 30th of January in 2015” makes more sense. Hope that helps!