Here in the States, as I referred to the other day, David Muir at 6:30 p.m. with "World News Tonight" is promoed by ABC as the most-watched program on American television, not counting the NFL. And in Australia, I've seen that the 5 to 7:30 p.m. time slots in Australia consistently pull bigger numbers than the rest of prime time (once again, not counting some live sports). This is only the six biggest cities, however. The only dinner hour national news is on the pubcaster SBS at 6:30. The newscasts at 5 on Network 10 (although only truly local in Melbourne and Sydney, due to cutbacks by Paramount the other big cities have news shops, but the anchors are in either Melbourne or Sydney) and at 6 on Seven and Nine are local. Ten's news is followed at 6:30 p.m. by the "View/Daily Show" cross "The Project" (the "Neighbours" reboot is on flanker channel 10 Peach, as it was when it ended the first time) and Nine is followed at 7 p.m. by the long-running tab "A Current Affair" (licensed by Fox in the U.S. for their version back in the 90s). The pubcaster ABC does their news at 7 p.m.
As for the rest of that time period, at 5 p.m. on Seven and Nine are game shows (on Seven, a local version of "The Chase," on Nine, a reboot of "Who Wants to Be a Millionaire" called "Millionaire Hot Seat," but it will be replaced in the new year by an Australian version of "Jeopardy!" shot in the UK and hosted by Stephen Fry, who is also doing the new UK version--this would mean that SBS will have to move to another time slot the U.S.version, which in their listings it's said "hosted by the late Alex Trebek") and "Home and Away" at 7 p.m. on Seven (it's currently on a holiday hiatus). The ABC leads into their news with a current affairs show called "The Drum" and SBS leads into their news with U.S. "Jeopardy!", "Letters and Numbers" (i.e. "Countdown") and "Mastermind Australia."