This is the 4869th most frequent Turkish word.
erdiğinde
"Erdiğinde" means "when it reaches" or "when it attains."
In this sentence, 'vardığımda' is derived from the word 'erdiğinde', used here as a temporal marker indicating the occurrence of arrival.
Okul bittiğinde eve vardığımda annem mutfağa geçmişti.
When I arrived home after school ended, my mother had moved to the kitchen.
Here, 'erdiğinde' implies reaching or attaining a goal, marking completion or realization in context.
Hayalindeki işe erdiğinde gerçek başarıyı hissettin.
When you achieved the job of your dreams, you felt true success.
'Erdiğinde' here is used to indicate a transitional state or the occurrence of nighttime.