Your task, should you accept it, will be to decide whether these are just randomly selected dates, or are days (nights) when something of scientific significance could have been observed, at other locations or weather conditions.
Andréa sends in this synchronicity. Cartoonists are always looking for a new angle, but sometimes push it too far.
Finally, like that house at the end of the night that gives out multiple candy bars so they won’t eat them all themselves, there’s this bonanza from John Atkinson — some cartoonists would have spread these out one at a time, and gotten a whole month out of this idea.