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:
and ends tomorrow at:
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: