23 of Elul 11th of September

credits
According to the Jewish calender spet. is the 23rd of Elul (22.9.11 this year).
Yahrtzeit, Nahala


A yahrtzeit candle lit in memory of a loved one on the anniversary of the death
Yahrtzeit, יאָרצײַט, means "Time (of) Year" in Yiddish.[14] (Alternative spellings include yortsayt (using the YIVO standard Yiddish orthography), Yohr Tzeit, yahrzeit, and yartzeit.) The word is also used by non-Yiddish-speaking Ashkenazi Jews, and refers to the anniversary of the day of death of a relative. Yahrtzeit literally means "time of [one] year".
The commemoration is known in Ladino as nahala. It is widely observed, and based on the Jewish tradition that mourners are required to commemorate the death of a relative.
Jews are required to commemorate the death of parents, siblings, spouses, or children.[15] The main halakhic obligation is to recite the mourner's version of the Kaddish prayer at least three times, Maariv at the evening services, Shacharit at morning services, and Mincha at the afternoon services. The customs are first discussed in detail in Sefer HaMinhagim (pub. 1566) by Rabbi Isaac Tyrnau.
The Yahrtzeit falls annually on the Hebrew date of the deceased relative's death according to the Hebrew calendar. There are questions that arise as to what the date should be if this date falls on Rosh Chodesh or in a leap year of the Hebrew calendar.[16] In particular, there are a few permutations, as follows: