Queensland, Western Australia and the Northern Territory do not observe daylight saving, so from October onward those three run an hour behind the south-eastern states. 27 October 2030 falls inside this seasonal clock split, which lasts until the following April when the south-east moves back onto standard time.
A public holiday that falls on a Sunday sits inside the weekend rather than beside it, and whether a substitute day off applies to the following Monday depends on the specific holiday and the state. Sunday 27 October 2030 falls on this day of the week, at the close of the weekend, immediately before the working week resumes.
2030 has 365 days on the calendar. Leap years add a single extra day to February, giving those years 366 days instead of 365 and shifting the day-of-year number for every date from March onward by one compared with an ordinary year. This is the only irregularity in the length of the Australian calendar year.