That sucks. I knew others started tomorrow but didn't know about today. I actually began seeing spoilers yesterday but how the person saw the movie early I have no clue, only press and vloggers were given early access.
Sadly in many ways this film spoiled a lot of itself during production.
Fans were able to preclude that the two main mast members would be Joe Taslim (Sub-Zero) and Lewis Tan (Cole Young) just based on the amount of posts they made about the film. Given the fact the cast members literally used social media to announce their arrival and departure on set, fans were even able to infer who had the most scenes and whatnot. Through social media fans also learned very early who Reiko and Kabal were and thanks to production's own windfall that Nitara was in the film. All this during production.
It seems the movie's delay to the 23rd does not apply to all countries, and it appears that the movie is actually premiering today in Thailand.
Expect to see a lot of spoilers between now and the 23rd If you don't wanna be spoiled, I'd recommend taking a break from any mediums that discuss MK until you get a chance to see it!