Announcement! 
The new moon was NOT sited in the land of Israel on Monday evening, meaning that Yom Teruah will be sunset, Tuesday, Sept 11 to sundown Wednesday, Sept 12. It follows then that Yom Kippur will be ten days later on Thurs, Sept 20 at sunset through Friday, Sept 21 sundown. Sukkot will be from Sept 25 sunset to Oct 2 sundown with Shemini Atzeret occurring on Wednesday, Oct 3.
For more information on the biblical calendar and how to determine the dates for the biblical feasts, please see my three teaching articles on the subject available at https://www.hoshanarabbah.org/teaching.html#feast.
Sept calendar with the fall moedim is available here: https://hoshanarabbah.org/calendars.html
Shalom, Lawrence. May I ask what source you use for the calendar observation in Israel?. I use Devorahs date tree.
So do we.