The current century being the 21st will make that very confusing. The 2000/2001 start of the 21st century is reasonable debate. Mathematically, 2001 makes sens

The current century being the 21st will make that very confusing. The 2000/2001 start of the 21st century is reasonable debate. Mathematically, 2001 makes sense. In terms of being excited during the 1999→2000 transition with all the digits incrementing, it makes more sense socially to have celebrated the new millennium and century then.