October 11 Holidays, events and History 2021.
| Date | Day | Holiday Name | Holiday Type | Country |
| 11 Oct | Monday | Moi Day observed | Public holiday | Kenya |
| 11 Oct | Monday | Day of respect for cultural diversity | National holiday | argentina |
| Oct 11 | Monday | Thanksgiving Day | National holiday | Canadian |
| 11 Oct | Monday | Columbus Day | National holiday | Chile |
| 11 Oct | Monday | Norfolk Island Agricultural Show Day | State Holiday | Australia |
| 11 Oct | Monday | National Day observed | National holiday | Taiwan |
| 11 Oct | Monday | Columbus Day | Public Holiday | American samoa |
| 11 Oct | Monday | Commonwealth Cultural Day | Public Holiday | Northern Marian Islands |
| 11 Oct | Monday | Lotu a Tamaiti | Public Holiday | samoa |
| 11 Oct | Monday | Columbus Day | Bank/Public Sector Holiday | Puerto Rico |
| 11 Oct | Monday | National Heroes Day | Public Holiday | The Bahamas |
| 11 Oct | Monday | National Heritage Day | Public Holiday | Turks and Caicos Islands |
| 11 Oct | Monday | Puerto Rico Friendship Day (Columbus Day) | Public Holiday | US Virgin Islands |
| 11 Oct | Monday | Day of People’s Uprising | National holiday | North Macedonia |