It's National Science Fiction Day. Have you watched the top 19 sci-fi movies of all time?

FILE - This image released by Universal Pictures shows Henry Thomas as Elliott and E.T. in a basket on a bicycle in a scene from director Steven Spielberg's 1982 movie "E.T.: The Extra-Terrestrial." (AP Photo/Universal Pictures)

WASHINGTON (CIRCA) — While the new year is a popular time for goal-setting and looking ahead to the future, it's not a bad time for reflection.

By that, we mean this second day of January is National Science Fiction Day , and it's the perfect opportunity to look back at the best sci-fi movies of all time.

Movie critic site Rotten Tomatoes ranks the 110 best , but in honor of the start of 2019, we've listed the top 19 here :