For Drik system followers (visible sky), Pambu is superior. For traditional temple rituals following Vakya system, Thirukanitha is used. The 2019-20 PDF explicitly states: "For Graha Shanti and marriage, cross-verify with a local priest."
This specific edition governed the period from the Tamil New Year on 14 April 2019 to the end of the cycle in mid-April 2020. Astrological Events: Pambu Panchangam 2019-20 Pdf