The Athabas method

Hello Michael, how can we explain phenomena that seem unlikely, such as this phenomenon that the days of Passover correspond to other dates?
 
In more detail – the letter A corresponds to the letter T, therefore the day on which the first day of Passover falls corresponds to the day on which Tisha B'Av falls.
Monday corresponds to Sunday – Monday of Passover falls on the same day of Shavuot
G is suitable for R – Rosh Hashanah etc…
 
Is there a probability calculation for this? Is it just a trick that seems unlikely but is very likely? Is it really unlikely but unlikely things happen too? Is it from heaven? What is your explanation for such phenomena in general, and what is the explanation for this phenomenon in particular?