Why would it crash on the 4th but not any other date?
You can also check the Microsoft app store to see if an updated version of JW Library is available that fixes this problem. Alternatively, you can download the songs for the Memorial from jw.org and play them using another app, such as VLC. In preparation for using JW Library to play songs at the Memorial, we recommend that you manually set the computer’s date to another date, such as April 5, 2023, and then try to load JW Library. On Microsoft Windows devices, JW Library may crash after startup when the computer’s date is April 4, 2023. JW Library Notice: Crashes on Windows Devices