Heures séculaires et instantanées (Age-Old and Instantaneous Hours) is a 1914 piano composition by Erik Satie. One of his humoristic keyboard suites of the 1910s, it features Satie's famous warning to pianists against reading aloud the fanciful texts that adorned his scores. In performance it lasts about 4 minutes. Publication of the Heures, like several of Satie's 1914 works, was delayed by the outbreak of World War I. It was finally issued by the firm E. Demets in 1916. Ricardo Viñes gave the premiere at the Galerie Barbazanges in Paris on March 11, 1917.
