David Joseph Colditz[1][2] (born August 13, 1991),[3][4] commonly known as Dave Days, is an American musician and internet personality.

He taught himself how to use audio and video production equipment, and while attending Downingtown High School East became interested in YouTube.

As "Dave Days", he quickly attracted enough of an audience to become a YouTube partner (earning income from advertisements) and, after just over a year, had over 200,000 subscribers and over 50 million views.

[1] His 2011 YouTube videos Next to You and Who Says placed in Billboard's uncharted top 10,[11][12] and his send-up of Katy Perry in a parody of Last Friday Night garnered attention.

[8][20] As of January 2024[update], Days has released 231 videos, which have had over 380 million combined views.