The Jews who had returned to the Land of Israel with Ezra and Nehemiah gathered on this day and repented their misdeeds, signing a document in which they committed to trust in G‑d and follow His ways. Among the mitzvot they specified were to refrain from intermarriage and from purchasing produce on Shabbat (Nehemiah 9:1–3; 10:1–32).
Link: The Return to Israel
R. Yaakov Yosef was one of the foremost disciples of the Baal Shem Tov. He was the first one to disseminate the teachings of Chassidut in print, publishing the work Toldot Yaakov Yosef in 1780.
Link: The Rabbi’s Secret Sins
On this day in 5756 (1995), the Ribnitzer Rebbe, Rabbi Chaim Zanvil Abramowitz, passed away. For decades, with great self-sacrifice, he lived a full Chassidic lifestyle under Soviet rule before emigrating to Israel and then the U.S.
The day following a festival is called Isru Chag ("tied to the festival"). Tachnun (confession of sins) and similar prayers are omitted throughout the remainder of the festive month of Tishrei.
Fighting evil is a very noble job. But it is not your mission in life.
Your job is to bring in more light.
Stay completely out of such battles, arguments, and debates.
Not because you aren't able to win. Not because your heart is too delicate to go to war.
But because every bit of your energy needs to be dedicated exclusively to strengthening the good that you have built, to give your very life for it.
Then, only then, can you succeed.