Does Light Year is their past? [duplicate]

I just wanted to know if what we can only see out-side of our planet is just the past of other objects?

If 1 Light Year is equals to 365.25 Days, then I saw an object outside our planet that is 1 Light Year away from us, does it means I just saw its past 365.25 days ago?

Light year is a measure of distance. Light in vacuum travels at a (large) finite value, $3 \cdot 10^5$ kilometers per second to be almost exact. We can exploit this speed as a function of time. If an object is 5 light years away, it means light must travel at that large speed for 5 years to reach Earth from where it left.