| 1/1/1866, Mon | New Year's Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 3/17/1866, Sat | St. Patrick's Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
- Note
- Large street crowds, City Center streets closed for parade
|
| 3/19/1866, Mon | St. Patrick's Day: Additional Observance Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
- Note
- Large street crowds, City Center streets closed for parade
|
| 3/25/1866, Sun | Palm Sunday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 3/30/1866, Fri | Good Friday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 3/31/1866, Sat | Holy Saturday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/1/1866, Sun | Easter |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 4/2/1866, Mon | Easter Monday |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 5/7/1866, Mon | May Day |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 6/4/1866, Mon | June Bank Holiday |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 8/6/1866, Mon | August Bank Holiday |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 10/29/1866, Mon | October Bank Holiday |
- Religion
- –
- Disrespectful to Hold an Event
- –
|
| 12/24/1866, Mon | Christmas Eve |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/25/1866, Tue | Christmas Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/26/1866, Wed | St. Stephen's Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/27/1866, Thu | Day after St. Stephen's Day |
- Religion
- Christian
- Disrespectful to Hold an Event
- –
|
| 12/31/1866, Mon | New Year's Eve |
- Religion
- –
- Disrespectful to Hold an Event
- –
|