How can I get the day of the year from datetime64 array?

Question

I have an array:

array(['1980-01-01T00:00:00.000000000', '1980-01-02T00:00:00.000000000',
       '1980-01-03T00:00:00.000000000', ...,
       '1989-12-29T00:00:00.000000000', '1989-12-30T00:00:00.000000000',
       '1989-12-31T00:00:00.000000000'], dtype='datetime64[ns]'

And I want to get another array with day of the year.

I am not sure how to use timetuple().tm_yday with it. Or something else.