I just asked because I was curious.
さAI generation time slots for Japan Standard Time (JST) as asked to Gemini
Just asked Gemini, so take it as a reference (´ω｀)
・Japan Time / Network Status / Reason
0:00-3:00 /Comfortable/ The US enters late night, global users decrease.
3:00-7:00 /Normal/ Japan and Asia asleep. Late night in Europe and US.
7:00-9:00 /Slightly crowded/ US prime time (evening to night).
9:00-12:00 /Normal/ US West Coast enters late night, gradually calms down.
13:00-16:00 /Most optimal/ All of Europe and US in complete midnight to early morning (sweet spot).
16:00-20:00 /Normal to slightly crowded/ Europe wakes up, usage increases towards evening.
20:00-23:00 /Very crowded/ European night + US morning + Japanese night clash.
The reasons seem off, but Gemini said so, so I don't know. I don't have the energy or motivation to correct it (´ω｀)
・Other
Friday night to Saturday morning: Time when the world starts getting crowded and tends to become heavy.
Sunday night to Monday early morning: Europe and US enter Sunday holiday mode and bedtime, surprisingly a good opportunity.