- This page is for the day of the calendar year. For the song by the Rentals, see October Twenty Seven.
- 1992 - Weezer performs at the Coconut Teaszer in Los Angeles, CA.
- 1994 - Weezer opens for Live in Riverside, CA at The Barn (University of California)
- 2008 - The final track list for Alone II: The Home Recordings of Rivers Cuomo is released on Pitchfork Media.
- 2009 - Weezer plays an acoustic set for Sirius XM's "Artist Confidential" at the Hard Rock Cafe in New York, NY. Rivers covers The Killers' song "Human" with classical musicians.
- 2009 - The originally planned release date of Raditude.
- 2014 - Weezer performs at the Bowery Ballroom in New York, NY on the Everything Will Be Alright in the End Tour.
- 2017 - Pacific Daydream is released. Weezer plays acoustic versions of "Happy Hour" and "Island in the Sun" on Loose Ends with Clive Anderson on BBC Radio 4. The show is broadcast the following day. Weezer plays live in Birmingham, United Kingdom at the O2 Academy on the Feels Like Summer Tour in support of Pacific Daydream.