| Title | Ephemera | 
| Alternative title | One Day. | 
| Creators | Paul Perillo (composer) | 
| Opus | Op.21 | 
| Instrumentation | piano | 
| Number of movements | — | 
| Keys | F major | 
| Composed | — | 
| First published | 1882 | 
| Dedication | Harry M. Van Lennep of New York | 
| Tempo markings | — | 
| Metronome markings | — | 
| Time signatures | — | 
| Average duration (sec) | — | 
| Number of measures | — | 
| Composition types | Pieces | 
| Period | Romantic | 
| View on IMSLP | ![]()  | 
        
| Code | 
(No sections)
(No arrangements)
(No recordings)
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