| 1/1/1990, Mon | New Year's Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 1/26/1990, Fri | Australia Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- 1999 Parades, special events
|
| 3/12/1990, 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.
|
| 4/8/1990, Sun | Palm Sunday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/13/1990, Fri | Good Friday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/14/1990, Sat | Easter Saturday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/15/1990, Sun | Easter |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/16/1990, Mon | Easter Monday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/25/1990, Wed | Anzac Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- Commemoration March
|
| 6/11/1990, Mon | Queen's Birthday/Volunteer's Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 9/7/1990, Fri | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/8/1990, Sat | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/9/1990, Sun | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/10/1990, Mon | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/11/1990, Tue | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/12/1990, Wed | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/13/1990, Thu | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/14/1990, Fri | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 9/15/1990, Sat | Royal Adelaide Show |
- Religion
- –
- Disrespectful to Hold an Event
- –
- Note
- State Fair-over 635,000 people
|
| 10/1/1990, Mon | Labor Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 12/24/1990, Mon | Christmas Eve |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/25/1990, Tue | Christmas Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/26/1990, Wed | Boxing Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 12/31/1990, Mon | New Year's Eve |
- Businesses Closed
- PM
- Religion
- –
- Disrespectful to Hold an Event
- –
|