The dictionaries list both possibilities to stress nineteen (or any other -teen, for that matter): ,nine-teen and nine-'teen.
Are the two pronunciations completely interchangeable, a matter of dialect, or a matter of meaning? I am asking because I've never heard nineteen stressed on the first syllable in sentences like:
I am nineteen years old.
He had only nineteen dollars.
And I have never heard nineteen stressed on the second syllable in dates:
He was born in nineteen sixty-four.
Is it acceptable (where, when?) to stress the first syllable in the first set of examples, and is it acceptable(where, when?) to stress the second syllable in the last example?
P.S. Surprisingly there's no stress tag. Am I using the wrong linguistic term?