3 月 14 日的圆周率日庆祝数学常数 pi。 Pi Day on March 14th celebrates the mathematical constant pi.

3 月 14 日（美国格式为 3/14）庆祝圆周率日，纪念数学常数 pi (π)，即圆的周长与其直径的比值。 Pi Day, celebrated on March 14th (3/14 in the American format), honors the mathematical constant pi (π), which is the ratio of a circle's circumference to its diameter. 圆周率的根源可以追溯到埃及、巴比伦和中国等古代文明，它在物理学、天文学和工程领域都有实际用途。 With its roots tracing back to ancient civilizations like Egypt, Babylon, and China, pi has practical uses in physics, astronomy, and engineering. 圆周率日也是阿尔伯特·爱因斯坦的生日，世界各地都会举办讲座、博物馆展览和吃馅饼比赛等活动，以提高人们对数学和科学的认识和兴趣。 Pi Day is also Albert Einstein's birthday, and events such as lectures, museum exhibitions, and pie-eating competitions are held worldwide to raise awareness and interest in math and science.