Public holidays
1980, Australia, South Australia
| # | Date | Public holiday |
|---|---|---|
| 1 | Tuesday, 1 January 1980 | New Year's Day |
| Monday, 28 January 1980 | Australia Day Observance | |
| 2 | Monday, 10 March 1980 | Canberra Day/Adelaide Cup/Eight Hours Day/Labour Day |
| 3 | Friday, 4 April 1980 | Good Friday |
| 4 | Saturday, 5 April 1980 | Easter Saturday |
| 5 | Sunday, 6 April 1980 | Easter Sunday |
| 6 | Monday, 7 April 1980 | Easter Monday |
| 7 | Friday, 25 April 1980 | Anzac Day |
| 8 | Monday, 9 June 1980 | King's Birthday |
| 9 | Monday, 6 October 1980 | Labour Day/King's Birthday |
| 10 | Thursday, 25 December 1980 | Christmas Day |
| 11 | Friday, 26 December 1980 | Boxing Day/Proclamation Day |