| 1/1/1920, Thu | New Year's Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 1/26/1920, Mon | Australia Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- 1999 Parades, special events
|
| 3/8/1920, Mon | Adelaide Cup Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- One of largest horse races in Australia, public holiday. Changed from May to March in 2007.
|
| 3/28/1920, Sun | Palm Sunday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/2/1920, Fri | Good Friday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/3/1920, Sat | Easter Saturday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/4/1920, Sun | Easter |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/5/1920, Mon | Easter Monday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/25/1920, Sun | Anzac Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- Commemoration March
|
| 4/26/1920, Mon | Anzac Day: Additional Observance Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- Commemoration March
|
| 6/14/1920, Mon | Queen's Birthday/Volunteer's Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 9/3/1920, Fri | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/4/1920, Sat | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/5/1920, Sun | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/6/1920, Mon | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/7/1920, Tue | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/8/1920, Wed | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/9/1920, Thu | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/10/1920, Fri | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/11/1920, Sat | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 10/4/1920, Mon | Labor Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 12/24/1920, Fri | Christmas Eve |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/25/1920, Sat | Christmas Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/26/1920, Sun | Boxing Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 12/27/1920, Mon | Christmas Day: Additional Observance Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/28/1920, Tue | Boxing Day: Additional Observance Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 12/31/1920, Fri | New Year's Eve |
- Businesses Closed
- PM
- Religion
- –
- Disrespectful to Hold an Event
- –
|