That Europeans turn stupid after midnight

Mezzo can be quite ambitious; last night for example Prokof P3 (Janis, RTF), Shostak S6 (Berstein, Vienna), and Prokof P3 again (Rabinowitz, Israel) -- wham-bam-bam -- one damn thing after another. And, cool. The P3 repeat is the really nice touch here: it's a measure of the hardness of the programming's core -- about 9.5 on my sclerometer -- we don't get bored with this stuff, eh?

But then, hit 12 AM, cinderellas turn into pumpkins and Mezzo audience -- stupid. And not just Mezzo. All Europe does. The universal rule of European cultural programming is -- Sundays we pray; and at night we mellow with

Jazzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

(Geeeeeeeeeeeeeez).

Who makes this a rule? Is it - Biblical or something?