Why isn't Hillel Leibowitz's Yahrzeit Exact?

We do not know the exact date of death of Hillel Leibowitz. According to Jewish tradition, if the exact date of death is not known, the yahrzeit of a person can be observed on any day, as long as it is that same day every year. Since that is the case, we observe the yahrzeit of Hillel Leibowitz on 12 Nisan. If you know the exact date of death of Hillel Leibowitz, contact us via the contact page. Be sure to include the url: https://eachofushasaname.org/person/3361/Hillel_Leibowitz.html
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