▁ 1 8 0 ▁ships , ▁including ▁the ▁popular ▁Charlotte ▁Rh odes ▁from ▁the ▁series ▁The ▁On ed in ▁Line . ▁The ▁Royal ▁House ▁was ▁also ▁present ▁with ▁Queen ▁Jul iana , ▁Prince ▁Bern hard , ▁Princess ▁Beat rix , ▁Prince ▁Cla us ▁and ▁the ▁princes ▁ab o ard ▁the ▁Piet ▁Hein ▁and ▁the ▁Gro ene ▁Dra e ck . ▁In ▁ 1 9 7 9 , ▁the ▁Open ▁Port ▁Day ▁was ▁held ▁under ▁the ▁mot to ▁' H allo ▁H aven ', ▁where by ▁the ▁public ▁was ▁given ▁access ▁to ▁normally ▁closed ▁industrial ▁areas ▁in ▁the ▁port , ▁such ▁as ▁ref iner ies ▁and ▁container ▁terminal s . ▁In ▁ 1 9 8 0 ▁the ▁decision ▁was ▁made ▁to ▁make ▁Port ▁Day ▁an ▁annual ▁event . ▁Event ually ▁it ▁also ▁became ▁the ▁multi - day ▁Har bor ▁Days , ▁which ▁now ▁take ▁three ▁days ▁during ▁the ▁first ▁week end ▁of ▁September . ▁The ▁Port ▁Days ▁were ▁held ▁for ▁the ▁ 3 0 th ▁time ▁on ▁ 7 , ▁ 8 ▁and ▁ 9 ▁September ▁ 2 0 0 7 , ▁with ▁the ▁theme ▁Working ▁on ▁World ▁Class . ▁There ▁was ▁also ▁Admir al ▁De ▁R uy ter ▁Home port ▁Race . ▁In ▁connection ▁with ▁the ▁ 3 0 th ▁anni versary , ▁there ▁was ▁an ▁opening ▁port ▁song ▁by ▁Ger ard ▁C ox ▁and ▁an ▁evening ▁program ▁on ▁September ▁ 8 ▁with ▁Gl oria ▁Est ef an , ▁among ▁others . ▁The ▁Port ▁of ▁Rot ter dam ▁Author ity ▁also ▁celebrated ▁its