By events we mean holidays. Here are universal firework emoji, gift, Christmas tree, balloon, pumpkin, firecracker and other attributes of modern and not so modern festivities. Some of them are dedicated to culture-specific holidays or just specific holidays, like pumpkin for Halloween, Christmas tree for New Year. Other symbols are more neutral, like a bow, ticket, stars.
Besides, there is a couple of emojis dedicated to Japanese traditions. I would say that the Japanese have peculiar holiday decorations that I'm not sure how to use. Like the flag with two fish, for example. Actually we talk a lot about this in our Holidays section.