The winter solstice falls in the third week of June every year, the shortest day and longest night on the Australian calendar. 12 June 2030 sits close to this turning point, after which daylight hours slowly lengthen again toward summer, even though winter continues for two more months, through July and August.
Wednesday 12 June 2030 sits at the midpoint of the standard working week, between Monday's start and Friday's finish. Australians commonly call this point in the week hump day, marking the transition from the first half of the working week to the second, with two working days already complete and two still remaining before the weekend begins.
A public holiday that falls on a Monday or a Friday produces a three-day weekend without using any annual leave, which is why long-weekend planning around 12 June 2030 depends on which day of the week the nearest public holiday falls on. A midweek holiday delivers no such automatic extension, though many workers bridge it with a single day of leave.