“Standard Time” takes its title from the idea of a shared clock, a useful frame for a program that measures how songs travel across eras and audiences. At Carnegie Hall, Michael Feinstein leads the evening with his long-running attention to the Great American Songbook, presented here in a Rock/Pop context rather than as period reconstruction. In New York City, where time is both logistics and mythology, the setting adds cultural weight even without a formal premiere claim. The work’s quiet argument is that standards endure because performers keep revising them.