Units in alphabetical order:
Centuries --> Day --> Decades --> Hour --> Month(30 days) --> Month(31 days) --> Millennium --> Minute --> Millisecond --> Nanosecond --> Second --> Year
 

Units in order of magnitude:
Nanosecond --> Millisecond --> Second --> Minute --> Hour --> Day --> Month(30 days) --> Month(31 days) --> Year --> Decades --> Centuries --> Millennium