Halloween and Other Related Traditions in America

When was Halloween first celebrated? It dates right back. In the kind of a point where it gets attached in the calendars, we know it today is around in the 10th century. If you want to root Halloween as in commemoration of the dead or connected with the dead, that this time of year, it's obviously happening before the 10th Century. Seaquin Run on Instagram has asked, why is Halloween seemingly mostly celebrated in North America today? And do you think that is a fair representation? Where did it originate and where has it been celebrated over history?