- Jan 2 Dutch premiere of Galt MacDermot, Gerome Ragni and James Rado's hippie musical "Hair" in Amsterdam
- Jan 3 Bill Jacob and Patti Jacob's musical "Jimmy", starring Frank Gorshin and Anita Gillette, loosely based on the life of NYC mayor Jimmy Walker (1926-32). closes at Winter Garden Theater NYC after 84 performances
- Jan 3 Jerry Herman's musical "Mame" closes at The Broadway Theater, NYC, after 1508 performances and 3 Tony Awards
"I Me Mine"
Jan 4 Beatles last recording session at Abbey Road studios, completing George Harrison's tune "I Me Mine"; John Lennon was on vacation and did not participate
Lennon, Yoko in Denmark
Jan 5 John Lennon and his wife Yoko Ono give a press conference in Aalborg, Denmark, revealing that they were only visiting
Woodstock Music and Art Fair
Jan 7 Farmers sue Max Yasgur for $35,000 in damages caused by "Woodstock Festival"