This is the 1404th most frequent Turkish word.
çıktığı
The Turkish word "çıktığı" means "that/which has emerged, exited, or arisen."
In this sentence, 'çıktığı' functions as a relative clause marker and means 'he climbed' to describe the specific days.
Ahmet, dağa çıktığı hiçbir gün kararsız değildi.
Ahmet was never hesitant on the days he climbed the mountain.
Here, 'çıktığı' refers to the time when 'it was released' as part of the movie's release date.
Filmin çıktığı tarihte çok az eleştirmen onu beğendi.
Very few critics liked the movie when it was released.
In this case, 'çıktığı' illustrates the aspect of 'ascended' with respect to the steps climbed by the players.