When the fast of Yom Kippur begins, and ends, in Gardens Hills

Of course, check your own local times at the sites given. What is given here is for Zip code 11367, in New York.

The Etz Chaim bulletin doesn't give a start time (though gives 6:26 as candle-lighting time), but gives an end time of 7:25 PM.

According to Chabad it begins today at candle-lighting time, at:

Candle Lighting | Fast Begins	6:27 pm
Shkiah (sunset)	6:45 pm

and ends tomorrow at:

Shkiah (sunset)	6:44 pm
Tzeit Hakochovim (nightfall)	7:17 pm
Holiday Ends | Fast Ends	7:24 pm

You can confirm yourself when candle-lighting is. There is an inyan of tesefet yom hakippurim at play here.

According to MyZmanim, about when the fast ends:

Yom-Kipper Ends with the emergence of 3 stars at: 7:23 PM [?מהיכא תיתי] Some wait 72 minutes - until 7:55 PM