According to the Etz Chaim weekly bulletin, the fast ends at 7:38 PM.
The same, according to Chabad:
|Tzeit Hakochovim (nightfall)|
and according to MyZmanim:
at 5:09 AM Dawn - Degrees
or at 5:20 AM Dawn - Fixed Minutes
Eating of a settled character - אכילת קבע - may not be started
during the half hour immediately preceding dawn. Please
consult your Rabbi for details.