Tax returns can be lodged from 1 July, opening a four-month window that runs to the 31 October self-lodgement deadline. 3 July 2030 falls inside the first month of both that window and the financial year that began on 1 July, with most of the tax season still ahead of it.
A public holiday landing on a Wednesday sits in the middle of its working week rather than beside a weekend, so it does not create a long weekend on its own. Wednesday 3 July 2030 falls on this day of the week, at the working week's midpoint, three working days deep into the week.
The quarter containing 3 July 2030 is based on the calendar year running January to December, a separate system from the Australian financial year, which runs from 1 July to 30 June and splits into its own four quarters. Businesses often track both systems side by side, one for tax filings and one for calendar-year planning.