Public Holidays - Melb Cup?

There is often talk about a public holiday for the Melb Cup. As well, people variously proclaim other occasions should be recognised with a public holiday.
If we had 2 new public holidays in SA at the expense of another two public holidays, which two would you scrap and which 2 would you bring in?
Me:
Scrap - Labour Day and Queens Birthday
Keep Volunteers Day (which is the same day as the Queens Birthday public holiday) and shift it to later in the year - eg July/August.
Public Holiday 2 should be announced annually and be one off recognition for commemoration of a special historical or present day event.
Your thoughts?
If we had 2 new public holidays in SA at the expense of another two public holidays, which two would you scrap and which 2 would you bring in?
Me:
Scrap - Labour Day and Queens Birthday
Keep Volunteers Day (which is the same day as the Queens Birthday public holiday) and shift it to later in the year - eg July/August.
Public Holiday 2 should be announced annually and be one off recognition for commemoration of a special historical or present day event.
Your thoughts?