Define light year. Is it a unit of time?

(N/A) Light year is defined as the distance travelled by light in a vacuum in $1$ year.
Speed of light in vacuum,$c = 2.99 \times 10^{8} \text{ m/s}$.
Distance travelled in $1$ year $= c \times t$
$= 2.99 \times 10^{8} \text{ m/s} \times (365 \times 24 \times 3600 \text{ s})$
$= 9.46 \times 10^{15} \text{ m}$.
No,a light year is not a unit of time; it is a unit of distance used to measure the vast distances between celestial objects.