The accepted definition of a solar tropical year is approximately 365.2422 days.
The Gregorian Calendar year has an average length of approximately 365.2425 days. The Gregorian calculation for a year is ((400 * 365) + 100 - 3 = 146,097) / 400 = 365.2425
The Mayan Calendar year comparison has an average length of approximately 365.2420 days. The Mayan calculation for a solar year is divided by 5,124 year periods which give the calendar the increased accuracy.
Not only does it account for it, it does it slightly more accurately than our calendar system does.
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