Context: The final is normally held the Saturday after the Premier League season finishes in May. The only seasons in recent times when this pattern was not followed were 1999–2000, when most rounds were played a few weeks earlier than normal as an experiment, and 2010–11 and 2012–13 when the FA Cup Final was played before the Premier League season had finished, to allow Wembley Stadium to be ready for the UEFA Champions League final, as well as in 2011–12 to allow England time to prepare for that summer's European Championships.

Question: When does the final take place? 
Answer: The final is normally held the Saturday after the Premier League season finishes in May.

Question: Was there a time this was not the case? 
Answer: in recent times when this pattern was not followed were 1999–2000

Question: Why was that? 
Answer: most rounds were played a few weeks earlier than normal as an experiment

Question: Did that ever happen again? 
Answer: 2010–11 and 2012–13

Question: What happened during those years? 
Answer: the FA Cup Final was played before the Premier League season had finished, to allow Wembley Stadium to be ready for the UEFA Champions League final

Question: When does the final never take place?
Answer: Unanswerable

Question: When is the UEFA Champions League normally held?
Answer: Unanswerable

Question: In what season was the UEFA Champions League not held on the normal day?
Answer: Unanswerable

Question: When was the final played early so that England could prepare for the UEFA Champions League?
Answer: Unanswerable

Question: What season were the European Championships played early as an experiment?
Answer: Unanswerable