Translation:It's the year two thousand nineteen.
Aloha e @einewhall , ʻae they are both correct translations. The distinction is in the emphasis placed, when comparing the two sentences. Your example, with " ʻO kēia" in the front, would actually emphasize that you are pointing out this year / this time right now in particular as being 2019.
Contrast the following sentences in English:
-Itʻs the year 2019.
IT IS the year 2019.
It is this year , that is the year 2019.
Notice how in English we require a lot of filler words or intonation to create emphasis in this particular sentence pattern? Hawaiian can create that same affect by carefully reordering phrases within a sentence in this particular case.
I hope this helps!! But yes, both should be accepted as answers.