Whale migration season runs along much of the eastern and western coastlines through May, one of the seasonal markers of the Australian mid-year. 31 May 2030 falls inside this stretch, as days continue shortening ahead of the winter solstice the following month and the ski season's opening in the Snowy Mountains and Victorian Alps not far behind it.
Friday 31 May 2030 is the last working day of the standard Monday-to-Friday week, the fifth and final working day before the weekend begins. A public holiday landing on this day of the week joins directly onto the Saturday and Sunday that follow it, forming a three-day weekend without using any annual leave.
The week number shown for 31 May 2030 counts full weeks from the start of 2030, a figure used in payroll cycles, rostering and any planning done in weekly or fortnightly blocks rather than by calendar month. Businesses running fortnightly pay runs rely on this figure to track which of the two alternating pay weeks a date falls in.