Quite interesting - Mayan day/nights and earth periods

[Spectrum]

there is also the concept of delayed reaction. when an effect puts various dynamics into motion in any given period, there is nothing that says the dynamics will surface right at the time of effect's continuance.

You are contradicting yourself:

notice how day periods coincide with positive atmosphere, peace and progress

1912-1932 day - is a period which sees a lot of changes in the world, especially fading away of nationalism after a major world war,

Not true, nationalism has increased.

moreover, actually the first world war could easily have begun (and in fact, should have) in 1912-1913 during balkan wars.

But it didn't, which reminds me of the saying "what the thinker thinks, the prover proves."

In any theory or scientific experiment, the exception much either be very rare or non-existent. In the timeline you provided the exception is the rule.

unfounded.

Fact, ask any scientist. It's common sense.