Since pirates spawn and exist for 6 hours, add either a TTL (time to live) or Spawn creation time to the pirate info panel.

This is a great idea, I hate having pirates just vanish while my fleet is inbound.

Time to live countdown.

that would be realy great! and highly appreciated

Make things easier, and help us save fuel.  So I'd only give it a 35% chance that it will happen.  Can't make this too easy for us.

i like it

Yeah maybe a hour warning / countdown to try and keep it "balanced".