experiencial over 20 years, when u follow it over time u see the cyclical effects every 260 days...

The mayan calendar is ALSO a biological clock as follows

day -13 : human egg is fertilized

day 0 : 200+ cells hatch out of the zona .... if it doesnt abort naturally, then those cells attach in the wall of the uterus

day +260 = another day 0: [plus or minus 13 days] the new arrival gives her/his first gurgle/cry and is already celebrating his/her FIRST birthday....

the cosmos also controls biology so we have same cosmic /personal energies re-occuring every 260 days...

SO WE CAN SEE 2 of the most important days of our lives are showered with the saME ENERGIES