:mayan33:

The baktun is 144,000 days.

There are 13 baktuns in the Mayan Calendar.

144,000 days x 13 baktuns = 1,872,000 solar days

Now the Gregorian calendar solar year is 365.2425

The Julian calendar solar year is 365.25

The Haab Mayan calendar solar year is 365

1,872,000 days/365.2425 (Gregorian solar year) = 5125.36 years

1,872,000 days/365.25 (Julian solar year) = 5125.256 years

and then here is the big difference....

1,872,000 days/365 (Haab solar year) = 5128.76 years

Subtract 5128.76 years (Haab) from 5125.256 years (Julian) =

READY........

=3.504 year difference and that makes 1260 days