Because the month is bigger and provides more context on it's own. You figure out the month first then place yourself within that scale.
Example:
"It's May (immediately tells us the context of 31days, spring, etc.) It is the 30th, so there's one day left in May"
Vs
"It's the 30th (provides no context except that it's not February). it's may, so there's one day left in May"
So both lead to the same conclusion, the first way just gives the limiting parameter/most context first.
Similar reasoning why the month is the primary separation on calendars.
Another example that follow this same principle, you tell time HH/mm to provide the larger context first, not mm/HH.
Lmfao. Least obviously biased propaganda piece against the DPRK AND most trustworthy BBC reporting.
"South Korean movies are smuggled over the border to show how rich and free south Korea is"
What even is the part where you can't type "older brother" because it automatically changes it and tells you the right context to use it...even when the "wrong" context isn't present. (And really this would be based if true anyway because...gross?)
Edit: maybe provide some explanation for why this "reporting" is trustworthy and relevant instead of a propaganda piece.
It's literally just a woman making claims holding a prop. There's no further evidence.