Grown adults at work celebrating birthdays like a bunch of children. Up until 1900 birthdays were only celebrated for children and up to the age of puberty, 13 years old. But old greedy Hallmark Cards thought why not get everyone to celebrate birthdays for every age. They would be able to sell millions more birthdays cards. Guilt and virtue signalling ensued. It was a smart marketing ploy and the masses fell for it. Suckers!