| Bugle calls are musical signals that   announce scheduled and certain non-scheduled events on an Army installation. Today the sound of the bugle is heard across Army Forts from early morning to   late at night. Literally, the bugle regulates the soldier's day. In a bow to the   modern electronic age, the calls are recorded, then broadcast on schedule through loudspeakers located around the post. Scheduled calls are prescribed by the commander and normally follow the sequence shown below.  Non-scheduled calls are sounded by the direction of the   commander. DAILY SEQUENCE OF BUGLE   CALLS 
                      
                        
                          | 1. | 05:50 FIRST CALL    | 14. | 13:00 DRILL CALL**  |  
                          | 2. | 06:00 REVEILLE   | 15. | 16:25 ASSEMBLY    |  
                          | 3. | 06:55 ASSEMBLY    | 16. | 16:30 RECALL    |  
                          | 4. | 07:00 MESS CALL (morning)   | 17. | 16:50 FIRST   CALL    |  
                          | 5. | 07:30 SICK CALL**  | 18. | 16:55 ASSEMBLY    |  
                          | 6. | GUARD MOUNTING (when scheduled)   | 19. | 17:00 RETREAT   |  
                          | 7. | FIRST SERGEANT'S CALL**  | 20. | (follows Retreat) TO THE COLORS   |  
                          | 8. | 08:55 ASSEMBLY    | 21. | 17:30 MESS CALL (evening)   |  
                          | 9. | 09:00 DRILL CALL**  | 22. | 21:00 TATTOO   |  
                          | 10. | OFFICER'S CALL**  | 23. | 22:45 CALL TO QUARTERS    |  
                          | 11. | 11:30 RECALL**  | 24. | 23:00 TAPS   |  
                          | 12. | 11:45 MAIL CALL    |  |  |  
                          | 13. | 12:00 MESS CALL (noon)   |  | ** (OPTIONAL) |  SUNDAY SEQUENCE OF BUGLE   CALLS 
                      
                        
                          | 1. | FIRST CALL    | 5. | ASSEMBLY    |  
                          | 2. | REVEILLE   | 6. | RETREAT   |  
                          | 3. | ASSEMBLY    | 7. | TO   THE COLORS   |  
                          | 4. | MESS   CALL (noon)   | 8. | TAPS   |  
                          | 5. | FIRST CALL (retreat)   |  |  |  ADDITIONAL BUGLE   CALLS 
                      
                        
                          | 1. | ADJUTANT'S   CALL (parade only)   | 2. | ATTENTION   |  |