duration.years
duration: X = years (D)
Duration equivalent numeric values in fixed-length years.
X = years (D) converts durations in D to the
equivalent number of fixed-length years (1 year equals 365.2425 days).
X is a double array of the same size as D.
Source Code: duration
As a duration method, years returns the duration expressed in fixed-length years (365.2425 days).
d = days (365.2425)
d = duration 365.243 days
years (d)
ans = 1