Public holidays
1666, Australia, New South Wales
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1666 | New Year's Day |
| 2 | Tuesday, 26 January 1666 | Australia Day |
| 3 | Friday, 16 April 1666 | Good Friday |
| 4 | Saturday, 17 April 1666 | Easter Saturday |
| 5 | Monday, 19 April 1666 | Easter Monday |
| 6 | Sunday, 25 April 1666 | Anzac Day |
| 7 | Monday, 14 June 1666 | King's Birthday |
| 8 | Monday, 4 October 1666 | Labour Day/King's Birthday |
| 9 | Saturday, 25 December 1666 | Christmas Day |
| 10 | Sunday, 26 December 1666 | Boxing Day/Proclamation Day |
| Monday, 27 December 1666 | Christmas Day Observance | |
| Tuesday, 28 December 1666 | Boxing Day Observance/Proclamation Day Observance |