ВВ
637591392000000000 20.06.2021 00:00:00 perl
637598304000000000 21.06.2021 00:00:00 C#
637592256000000000 21.06.2021 00:00:00 perl
637599168000000000 22.06.2021 00:00:00 C#
637593120000000000 22.06.2021 perl
621355968000000000 01.01.1970 00:00:00 C#
Console.WriteLine( new DateTime(1970, 1, 1, 0, 0, 0).Ticks );
print((Time::Piece->strptime("22.06.2021 00:00:00 +0000", "%d.%m.%Y %H:%M:%S %z")->epoch + 62134992000) * 10**7);