This is the 3095th most frequent Turkish word.
bittiğinde
"When it is finished" or "When it ends."
Here 'bittiğinde' is used to indicate the time when the event (the class ending) occurred.
Ders bittiğinde hepimiz dışarı çıktık.
When the class ended, we all went outside.
In this example, 'bittiğinde' refers to the moment at which the movie ended, providing a temporal connection.
Film bittiğinde saat çok geç olmuştu.
When the movie ended, it was very late.
Here 'bittiğinde' conveys the moment the book's completion came about, serving as a condition for the second action.