Why isn't Roche Jakobson's Yahrzeit Exact?

We do not know the exact date of death of Roche Jakobson. 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 Roche Jakobson on 20 Shevat. If you know the exact date of death of Roche Jakobson, contact us via the contact page. Be sure to include the url: https://eachofushasaname.org/person/2481/Roche_Jakobson.html