'This morning..' in Creole is "Maten an"? Why doesn't "maten an" translate as "the morning"?

This morning → maten an or maten sa (sometimes)


How are you doing this morning?
Kouman ou ye maten an?


Where are you going this morning?
Kote ou prale maten an?


the next morning
nan demen maten


the next day
nan demen
nan landmen


When I woke up the next day, he was already gone.
Lè m te reveye nan demen, li te gentan pati.


Will you be here tomorrow morning?
Eske w'ap la demen maten?