On Sunday, the first of Adar Rishon 5404 (1644), he was officially appointed Av Beis Din, and he wrote in his Megillas Eiva a new directive that his family observe the 1st of Adar as a personal family celebration of thanksgiving, to thank and praise Hashem on the day he was officially installed as Av Beis Din Cracow:
“Up until now, I hesitated to establish a day of feast and festival; however, I now resolve to establish this day as a Yom Tov festival. Mi’shenichnas Adar Marbin B’Simcha! The first of Adar, the second day of Rosh Chodesh, is established for all generations for my children and descendants, sons, daughters, sons-in-law and daughters-in-law, because on that day my crown and honor were restored and I was appointed Av Beis Din and Rosh Yeshiva of the great and holy congregation of Cracow and all its neighboring provinces. May Hashem merit us all to serve Him and fulfill His laws, and [may I] live out my days not for the pursuit of wealth, but for an exalted yearning as demonstrated by my conduct until the coming of Mashiach, amen. The symbolism of the year when the attribute of harsh judgment was leveled against me is Shaphat (judgment = the year 1629)שפ''ט). The symbolism of the year of my redemption, when my crown of glory was regained and restored, is 1644) ת''ד) = Das – the law, ve’ha’das nitna beShushan haBira – and the law was enacted in Shushan,” to sing and rejoice with a happy heart. So saith Yom Tov Lipman ben Nosson HaLevi Heller,” (Megillas Eivah).
