October 1, 1963
- China
- National Day
- Cyprus
- Cyprus Independence Day
- Hong Kong
- National Day
- Nigeria
- Independence Day
- San Marino
- Cerimonia di investitura dei Capitani Reggenti
October 2, 1963
- China
- National Day
- Mid-Autumn Festival
- Guinea
- Independence Day
- South Korea
- Korean Thanksgiving
- Taiwan
- Mid-Autumn Festival
October 3, 1963
- China
- National Day
- Germany
- National Holiday
- Hong Kong
- The day following the Chinese Mid-Autumn Festival
- Honduras
- Soldier's Day
- South Korea
- National Foundation Day
October 4, 1963
- Lesotho
- Independence Day
- Mozambique
- Peace and Reconciliation Day
October 6, 1963
- Christmas Island
- Territory Day
- Egypt
- Armed Forces Day
October 8, 1963
- People's Republic of Bangladesh
- Durga Puja
- Croatia
- Independence Day
- Peru
- Battle of Angamos
October 9, 1963
- St. Barths
- Abolition of Slavery
- France
- Abolition of Slavery
- South Korea
- Hangul Day
- Sint Maarten
- Constitution Day
- Uganda
- Independence Day
October 11, 1963
- Macedonia
- Revolution Day
October 12, 1963
- Brazil
- Our Lady of Aparecida
- Bahamas
- National Heroes' Day
- Chile
- Columbus Day
- Costa Rica
- Columbus Day
- Spain
- Fiesta Nacional de España
- Republic of Equatorial Guinea
- Independence Day
- Honduras
- Columbus Day
- Canary Islands
- Fiesta Nacional de España
- Malaysia
- Sarawak State Governor's Birthday
- Nicaragua
- Indigenous Resistance Day
- Venezuela
- Day of Indigenous Resistance
October 14, 1963
- Argentina
- Day of Respect for Cultural Diversity
- American Samoa
- Columbus Day
- Bahamas
- National Heroes' Day (substitute day)
- Belize
- Day of the Americas
- Canada
- Thanksgiving
- Colombia
- Columbus Day
- Georgia
- Svetitskhovloba
- Guam
- Columbus Day
- Moldova
- Capital's Day
- Puerto Rico
- Columbus Day
- Turks & Caicos Islands
- National Heritage Day
- Tanzania
- Nyerere Day
- United States of America
- Columbus Day
- U.S. Virgin Islands
- Virgin Islands–Puerto Rico Friendship Day
October 17, 1963
- Haiti
- Anniversary of the death of Dessalines
October 18, 1963
- Azerbaijan
- Independence Day
- United States of America
- Alaska Day
October 19, 1963
- Brazil
- Dia do Piauí
October 21, 1963
- Burundi
- Ndadaye Day
- Honduras
- Armed forces Day
- Jamaica
- National Heroes Day
- Kenya
- Mashujaa Day (substitute day)
- British Virgin Islands
- St. Ursula’s Day
October 25, 1963
- Grenada
- Thanksgiving Day
- Hong Kong
- Chung Yeung Festival
- New Zealand
- Provincial anniversary day
- United States of America
- Nevada Day
October 26, 1963
- Austria
- National Holiday
- Cook Islands
- National Gospel Day
October 27, 1963
- St. Vincent & Grenadines
- Independence Day
October 28, 1963
- Cook Islands
- National Gospel Day (substitute day)
- Cyprus
- National Holiday
- Czech Republic
- Independent Czechoslovak State Day
- Greece
- National Holiday
- Ireland
- October Bank Holiday
- New Zealand
- Labour Day
- St. Vincent & Grenadines
- Independence Day (substitute day)
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