Brilliant film. Universal Pictures will re-release the film in theaters with digitally remastered 4K picture and Dolby Atmos sound on December 7, 2018 (UK TBC)
This link states it was in cinemas on 7th December 2018, though I didn't see any mention of it at my local Cineworld.U.K. rerelease is 27th January according to this article but no booking pages up on Cineworld, Vue or Odeon as yet...
Schindler's List at 25: looking back on Spielberg's defining Holocaust drama
That link states across the United States and Canada.This link states it was in cinemas on 7th December 2018, though I didn't see any mention of it at my local Cineworld.
Schindler's List Set For A Theatrical Re-Release For 25th Anniversary