Why isn't Elias Isakowitz's Yahrzeit Exact?

We do not know the exact date of death of Elias Isakowitz. 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 Elias Isakowitz on 29 Av. If you know the exact date of death of Elias Isakowitz, contact us via the contact page. Be sure to include the url: https://eachofushasaname.org/person/2299/Elias_Isakowitz.html