Who knows two hundred thirty-six?
Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:
Upvote all interesting answers.
Accept the best answer.
Go on to the next number.
geoffc's comment gave me an idea:
236 words in Krias Shema (out of the total of 248, including, as the case may be, א-ל מלך נאמן or the repetition of אני ה' אלקיכם or ה' אלקיכם אמת) are where we are accepting on ourselves Hashem's mitzvos. (The remaining 12 - the first verse of Shema, and ברוך שם - are the acceptance of His kingship.)
(Shulchan Aruch, Orach Chaim 61:14)
In a non-leap year, Yom Yerushalayim is the 236th day in the year if Heshvan and Kislev are both Mele'im (have 30 days):
Tishrei, Heshvan, Kislev - 30 days each