This is the 979th most frequent Finnish word.
tiistaina
"Tiistaina" means "on Tuesday" in English.
Here, 'tiistaina' specifies the day on which the event of going to the theater occurs, functioning as an adverbial of time.
Tiistaina menemme teatteriin.
On Tuesday, we are going to the theater.
Here, 'tiistaina' indicates a future planned event, identifying the specific day for the interview.
Saisinko haastattelun ensi tiistaina?
Could I have the interview next Tuesday?
'Tiistaina' in this sentence specifies a past occurrence, indicating when the waiting happened.