title: Duration
text: # Duration
  
  Duration may refer to:
  
  * The amount of time elapsed between two events
  * Duration (music) – an amount of time or a particular time interval, often cited as one of the fundamental aspects of music
  * Duration (philosophy) – a theory of time and consciousness first proposed by Henri Bergson
  * Duration (project management) – the number of calendar periods for the completion of a project in project management
  * Bond duration – the weighted average time until the various cash flows from a bond are received
  