The only Sundays left are the 11th, 18th, and 25th. Based on the past,I would wager that the smart money would have to go with the 11th... We’ll be in the middle of a 3-day weekend here in the States, and on US military bases in Germany. More audacious than that would be an attack on 2 or all 3 of those Sundays.
I would seriously consider that they are lying about the day of the week.