Dates of nightfighter claims

[Nokose]

I have been going through the book "Огненные Ночи Курской Битвы" by A. Sergienko. In the book it describes the night of the 21Jul43 when Wittgenstein shot down three Pe-8 of the ADD over Orel. It describes the mission took place on the night of the 21st. In Tony Woods list it has the night of the 20-21Jul43. The times can't have started on the 20th if the mission was flown on the 21st. The times for the attacks on the Pe-8's were 22:50 (Moscow time) and 21:50 (eastern European time not Berlin) for Wittgenstein. So can someone explain the 20th part on the list?

[Nokose]

Since I recieved no answer I carefully went through the entire chapter of the book for the 20-21Jul43. It states that Luftflotte 6 had placed the wrong date for the loss of the three Pe-8's claimed by Wittgenstein which were actually lost on the night of the 21-22Jul43. Since the claims of the 19-20Jul43 are actually the 20-21Jul43. Two of Wittgensteins claims for a Boston and an Il-4 didn't go down.