Christian Marclay/LACMA

"The Clock" is a 24-hour single-channel montage constructed from thousands of moments of cinema and television history depicting the passage of time.

"The Clock" is a 24-hour single-channel montage constructed from thousands of moments of cinema and television history depicting the passage of time. Marclay has excerpted each of these moments from their original contexts and edited them together to create a functioning timepiece synchronized to local time wherever it is viewed. The sampled clips come from films of all genres, time periods, and cultures, some lasting only seconds, others minutes, and have been culled from hundreds of films, famous and obscure, into a seamless whole.

"The Clock" debuted at LACMA last year and is returning for another uninterrupted 24-hour screening September 22nd.