You said :  Feast of Tabernacles coming on the 27th of September

This is incorrect.  As the feast of tabernacles does not come before the feast of trumpets.  And trumpets is September 30th-October 1st

You also said:  the Day of Atonement on the 22nd.   This too is not correct.  Day of Atonement, also known as Yom Kippur is on October 9th
And Tabernacles falling on October 14th-20th.