The Dunedin City Council has agreed to let bars to stay open for the first hour of Anzac Day so Aerosmith fans can have a nightcap after the band's gig at Forsyth Barr Stadium.
Concert promoter Andrew McManus said licences could be extended to 1am "so revellers can wind down after their hard day".
Council liquor licensing and projects officer Kevin Mechen said it was the first time he could recall the council allowing Dunedin bars to remain open into Anzac Day.
"The only reason they can stay open is because we have got an event in the city."
The concert finishes at 11pm. Fans might want a nightcap and "police figure they will get back into town at about 11.45pm and they've got another hour to have a couple of quiets and to wander off to wherever they are staying", Mr Mechen said.
Police would oppose any application for a licence beyond 1am, he said.