No it's okay I think I can see where it's getting messed up. I do it too. Instead of sitting down and focusing on it and breaking it down I just let it zoom over me and I can't get it. That isn't because you're stupid I think it's just because you have a hard time concentrating. I will try and make it easy to focus on:
Okay, you live in the United States. So the day for you right now is Saturday. Right? So as soon as the time where you live hits 12:01AM, it will then be Sunday. Because as soon as it is past 12:00AM, the day switches.
Now you know that in different parts of the world, the time is different. Those are called Time Zones. I live in Central Standard Time Zone so the time here is 3:05PM.
So I used Australia as an example because they are very ahead of us in time. I don't know the exact time, so I used 12 hours as an example.
In Australia, the day is Sunday. Because they live in Australian Standard Time, the time there would be 3:05AM. That means in Central Standard Time (Where I live) it is the afternoon, whereas in Australian Standard Time it is already the next morning.
So, Australia is already in Sunday. The reason why is because in Australia it is already past 12:01AM, because they are over 12 hours ahead. (Again, a random estimate)
That is the way it is wherever you are. No matter what country or continent you live in, it will always be "tomorrow" whenever the time hits 12:01AM. So it becomes "tomorrow" at different times everywhere all over the world. In the United Kingdom it will be Sunday six hours earlier than it will be here in Alabama, because the United Kingdom is six hours ahead in their time zone.
I'm not a very good teacher but hope I helped a bit anyway.