How to calculate cloudy and sunny days?

Cloudy days are subject to odd numbers, and sunny days are subject to even numbers;

Cloudy months are subject to even numbers, and sunny months are subject to odd numbers;

Cloudy days shall be subject to even numbers, and the gradual odd numbers of the sun shall prevail;

Cloudy days are subject to even numbers, and sunny days are subject to odd numbers.

So odd days are sunny and even days are cloudy, which is related to gossip.