Why isn't Mere Lippmann's Yahrzeit Exact?

We do not know the exact date of death of Mere Lippmann. 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 Mere Lippmann on 27 Sivan. If you know the exact date of death of Mere Lippmann, contact us via the contact page. Be sure to include the url: https://eachofushasaname.org/person/3759/Mere_Lippmann.html