The erect penis is a symbol of in many cultures, past and present.

i this is the answer i looked it up on google so in 2020 new year's occurs on january 1st, 2020 and christmas on december 25th, 2020. these dates are 51 weeks and 2 days apart, not one week apart (during the year new year's occurs before christmas).

the answer is counterpoint.

counterpoint definition: "the art or technique of playing a melody or melodies in conjunction with another, according to fixed rules."

counterpoint is present in a lot of baroque music- such as bach (notably his wtc prelude and fugues) and scarlatti, but can also be found in music by mozart, beethoven. it can even be found in music as modern as john williams!