Posted this in response to another comment but: While the Julian calendar was clearly more secular, The motivation for the adjustments in the Gregorian calenda

Posted this in response to another comment but: While the Julian calendar was clearly more secular, The motivation for the adjustments in the Gregorian calendar was to re-align Easter to a historically accurate date and to ensure that people around the world were celebrating it at the same time. While you are definitely right that the Gregorian calendar stems from Roman culture, one cannot deny that its revisions were religiously motivated and funded. Further, that its history and global adoption is intertwined with the spread of Christianity around the world. With its global adoption cultures all around the world have lost their connection to their own calendars and practices.