"G'day, Missus," said he, with a jerk of his head, and he shifted from one leg to the other, and turned his hat over and over uneasily in his great brown hands. […] "G'day," said 'Lizer, with a bright smile that revealed the prettiest of white teeth. The girl's mouth was as fresh as a rose. […] "G'day, Missus, hope you're keepin' well, an' the Boss, an' the children. Got back sooner'n I expected; Well, how's my mate shapin?" said he. […] It ain't no one's fault but mine," he said, generously. "G'day, Missus; I'm goin' ter find my mate, alive-or dead;" and he galloped away.
2016 February 20,Ned Latham,“Odd behaviour UPLOAD”, inaus.computers.linux, Usenet:
G′day, Muck. […] Ned
(Canada, US,air traffic control,informal) Denotes the end of a radio transmission.
Golf Golf Whiskey Golf, cleared the ILS approach runway one two, contact Sault Tower one one eight decimal eight, g'day.
Usage notes
(good day): Used interchangeably with hello and hi, but more characteristically (and stereotypically) Australian/New Zealand, and perhaps the most informal of these options. Also used in the constructions G′day, mate (a greeting to a friend or acquaintance) and G′day, stranger (ironically, to a friend not seen in some time).