addition to the regular programming on the FM frequency. To cut costs and prepare the stations for commercial sale, Radio New Zealand began rebranding AM stations to Newstalk ZB and rebranding the FM stations as Classic Hits. The Classic Hits stations originally retained their heritage identity until 2009, and used a uniform green diamond logo until June 2011. The first group of the stations adopted the brand in late 1993 or early 1994. Waikato's 1ZH became Classic Hits ZHFM, Bay of Plenty's 1ZD Radio BOP became Classic Hits BOP FM, Rotorua's Geyserland FM became Classic Hits Geyserland FM, Radio Taranaki became Classic Hits Taranaki FM, and Hawke's Bay's Bay City Radio became Classic Hits Bay City Radio. Similar names were adopted by Radio Northland, Radio Nelson, South Canterbury's Radio Caroline, Dunedin's 4ZB and Southland's 4ZA.. Wellington Goldtime Oldies B90FM and Christchurch's Goldtime Oldies B98FM also rebranded as Classic Hits but retained the stations oldies format playing music from the 1960s and 1970s, all other Classic Hits stations at the time were playing music from the 1960s to current 1990s hits. Programming remained local on all stations between 6am and 7pm with a networked night show originally based in Hamilton and with Hamilton advertising, at this stage Auckland, Wellington and Christchurch were still local 24 hours a day. In 1995 the night show was moved to Auckland. Privatisation In July 1996 the New Zealand Government sold off the commercial arm of Radio New Zealand, which included, among other things, the Classic Hits brand. The new owner was The Radio Network, a subsidiary of APN News & Media and Clear Channel Communications, which operated as a division of the Australian Radio Network. The company expanded its reach with new purchases, converting most of its local stations to the Classic Hits brand. The new business controlled 60% of the radio advertising market in November 1998 and more than half the market in 2002. However, in response to increased competition and falling market share, it looked for ways to cut costs. In its early years Classic Hits broadcast live local programmes in every region from Monday to Saturday, taking Auckland network programmes at night and on Sundays. In 1998 it reduced local programming to four hours a day in all regions except Christchurch, and introduced new network shows for mornings and afternoons. As Christchurch announcers left, their shows were also replaced with network programmes.