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 2027 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.
Monday 31 May 2027 is an ordinary working day for the standard Monday-to-Friday workforce and counts toward the working-day total shown above, along with the four days that follow it through to Friday, separate from the shift rosters that retail, hospitality, healthcare and emergency services run on their own patterns.
2027 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.