Aloysius Lilius was born in Calabria, Italy circa 1510. He studied medicine and astronomy in Naples. While I have no data to back up it is noted he worked for Earl Carafa as his physician. Now, to his astronomy he noted something about the new moons and therefore he wrote a manuscript about his observations that has not survived.
Sadly, he died before his findings and manuscripts was presented to Pope Gregory XIII. Aloysius his brother presented it to the Pope, in 1575 it was printed and circulated within the Roman Catholic world. It has survived to this day. For you see until then people widely used the Julian calendar. His basis became the Gregorian Calendar reform of 1582, the same calendar we use to this day. Until tomorrow keep that smile on your face, apply for a spot-on Jeopardy, who knows you may win. BTW I only charge a mere 10% royalty…..