I have an iPhone with the latest iOS (10.1) and I have both an English and Spanish keyboard enabled. The autocorrect is helpful in most cases and generally good for Spanish. However, I've noticed that since the last update, iOS is now capitalizing "buen día" as in "Buen Día" no matter where in the sentence you use it. I have no idea why this is the case and think it may be an error on Apple's part.
Can anyone think of a reason why "buen día" would be capitalized in every instance?