If you don’t check the link to the source article, please note that it concludes as follows:
” What's more, Chinese records show every appearance of Halley's Comet since 240 B.C, including passes during the "phantom" time, all of which can be verified with our own astronomical calculations today.
Sorry, phantom time fans, the year is 2021 and a pope was bad at math.”
Still, it is a fun idea !