ANZAC Day dawn services are held nationwide on 25 April, and Easter's four-day break sits within or close to April depending on the year. 21 April 2028 falls in the same 30-day month as both observances, giving autumn the busiest run of national holidays anywhere on the calendar, ahead of the quieter months that follow in May and June.
Friday 21 April 2028 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.
2028 has 366 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.