Conversation so far:
When was Hasan al-Askari born?
In 231 or 232 A.H., Hasan al-Askari was born in Medina.
Where was Hasan al-Askari born?
In 231 or 232 A.H., Hasan al-Askari was born in Medina.
Who were Hasan al-Askari's parents?
Hasan al-Askari's parents were Ali al-Hadi and Al-Askari's mother's given name was Hadith, though some say she was called Susan, Ghazala, Salil, or Haribta.
Did Hasan al-Askari have siblings?
Hasan al-Askari's siblings were Muhammad and Ja'far.
Anything important or notable about Hasan al-Askari's early life?
It is said that even as a child, Hasan al-Askari was endowed with divine knowledge.
Did Hasan al-Askari receive any education or religious training?
No formal training but, in Samarra, Hasan al-Askari spent most of his time reading the Quran and the Sharia.
Any other pertinant or interesting info the reader should know about this article?
According to Donaldson, Hasan al-Askari must have studied languages. In later years it was known that he could speak Hindi with the pilgrims from India, Turkish, and Persian.
Any other background info on Ali al-Hadi?
According to Shiite accounts, Hasan al-Askari was poisoned through intrigue of Al-Mu'tazz the Abbasid caliph, in 254/868, and was buried in Samarra.

Question: Any other information about his formative years that is important?
Self-contained rewrite: Any other information about Hasan al-Askari's formative years that is important?