[SaveFerris]

https://www.timeanddate.com/calendar/monthly.html?year=2017&month=9&country=34

Here’s Time and Date for September 2017.

[editor-surveyor]

.
That calendar is off by a day.

The moon was sighted Wednesday evening.

(which confirms what I stated earlier: Its a difficult event to predict)

Rood's calendar (printed shortly after the Aviv) has it correct.

Rood's Calendar for September
.