Question: how do jehovah's witnesses celebrate the memorial of christ's death?
Answer: Jehovah's Witnesses commemorate Christ's death as a ransom or "propitiatory sacrifice" by observing the Lord's Evening Meal, or Memorial. They celebrate it once per year, noting that it was instituted on the Passover, an annual festival. They observe it on Nisan 14 according to the ancient Jewish lunisolar calendar.