Her funeral will be held at 2pm at the Rev. Sioni Kami Memorial Church in Port Moresby.
Family, friends, colleagues and the public who were touched by Ruby's life and story are expected to attend.
The late Ruby passed away at the Port Moresby General Hospital on Saturday, February 11.
She was 24 at the time and would have celebrated her 25th birthday on February 13. The late Ruby was the Miss South Pacific PNG 2012-2013.