The pirate days

 is a term used by some societies within the United Stars of the Galaxies to describe a period in their history in which piracy was openly practiced. Amoung other societies the following have been known to use that term.
 * 1) Union Dai refering to the time prior to their tribe deciding to join the Union.
 * 2) Nilfeheim refering to the period begining in 2200 OTT and ending in 2388.