A lot of your premises are flawed. Christmas and Easter aren’t necessarily the biggest holidays in the modern world. They’re big holidays in Christendom, specifically in the US and Europe. Christmas “might” be the biggest holiday in the modern world, maybe. But only if you include the secular aspects of Christmas: Santa, presents, lighted trees, reindeer, etc. And you could argue that those modern secular aspects of Christmas represent a heresy, valuing the material things above the spiritual. Plus, there is a strong argument that Dec 25 has nothing to do with the birth of Christ. That Jesus was likely born in the spring, and that Dec 25th was chosen more as “marketing” to coincide with pre-existing Pagan holidays. Yet another heretical idea. You are probably over-rating the importance of Easter. I am aware that Christmas and Easter bring the biggest attendance at any Christian Church. They are the holidays that bring out the most casual of believers. But is that a good thing? That some casual believers can only be dragged into church twice per year? Plus Easter has its own secular, materialist trappings: Bunnies, eggs and baskets full of candy. You could probably add fashion to the list too, since plenty of people splurge on fancy dresses and outfits just for Easter. Speaking as a secular person from the US, Easter seems no more important than New Years, Valentines, St. Patties, Memorial Day, July 4th, Halloween or Thanksgiving. Just another holiday with its own special color scheme and food and nick knacks. You don’t even get a federal holiday for Easter. Unlike Christmas, I’d argue that Easter has little relevance outside of Western Christendom. Worldwide, New Years or Chinese New Year is probably bigger. Or some Muslim / Hindu / Buddhist holiday. The BC/AD year numbering is widely used, but remember that many other cultures have different their own calendars: the Jews, the Muslims, the Chinese, etc. Because Western culture invented and got a headstart on computing, most other cultures NEED to recognize our year numbering more than we need to account for theirs, but that reallly has more to do with Bill Gates and Steve Jobs than Jesus. Boasting that Western art features Jesus prominently really speaks more towards your Eurocentrism than anything else. Yes, Europe was mostly Christian. If you read through a “classic” art history textbook, you’lol see lots of Jesus because they tend to focus on modern-ish European art. But globally, and historically, not all too prominent. Probably no more important than the Buddha or global representations of Pagan gods from ancient Greece to the Aztecs to African gods, etc. But even if we concede your point that Jesus was the most important figure in Earth’s history ... was Jesus a force for good? Think about the Crusades, the Spanish Inquisition, witch hunts, colonialism, slavery, genocide, apartheid, ... even the Holocaust. How much suffering and death and war in the name of Christ? How many kids were molested by Catholic priests (and plenty of other denominations)? How many child brides from the Mormons and other splinter groups? You say no intellectually honest person could deny the impact of Jesus, but are you being intellectually honest about HIS impact? I can anticipate your rebuttal. Those weren’t REAL Christians. They were corrupted by the devil or politics or whatever. But you don’t get it both ways. Like any religious figure, Jesus and his teachings are a product of men and their disparate intentions for good and evil. The myths of Jesus were made vague enough to justify any position from pacifism to war to rape to slavery. It’s a cliche that the victors write history. If that’s true, then Christ’s prominence in history was earned in blood. A fact you probably need to reconcile with yourself.