Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Your friend will be turning four years old because leap years occur once every four years on our Gregorian calender (the most popular type of calender in the world). They do not exist in places that do not use this type of calender or rely on the natural world (moon,sun,weather) to measure time and dates.
