Does that mean that in your country, the day is considered to start at 1:00 AM rather than midnight? That choice is very strange when combined with the choice to call midnight "0:00" rather than "12:00 PM".
So noon is "12 in the morning", which is an hour after "11 in the morning"; and midnight is "12 in the evening", which is an hour after "11 in the evening".
† That is, you follow 11:00 PM with 12:00 AM, and you don't actually refer to "AM" or "PM". Both of those are normal US practice. You are different in the use of 24-hour formats in writing, but that has no bearing on the question of whether the hour following 11 PM is 12 AM; you just assured me that that's true in both countries.