So I'm trying to figure out this statement about the Mayans didnt count leap years?

[Kayla]

So a leap year actually means that Febraury has 29 days instead of 28. This occurs every 4 years meaning on leap year, there are 366 days in the year rather than 365. The Mayans did not add these extra days so they are ahead of us , so yes the world should have ended 7 months ago based on their calculations. The " without" means their lack of adding 1 day to February every 4 years. I know. It's confusing.