October marks a number of significant milestones and global observances as we transition into the autumn season. This month is packed with activities, from holidays and ethnic festivals to worldwide awareness initiatives.
The following are some of the important dates and occasions to remember in October:
| No. | Date | Importance | Country |
| 1 | Oct-01 | National Day | China |
| 2 | Oct-01 | Independence Day | Cyprus |
| 3 | Oct-01 | Independence Day | Nigeria |
| 4 | Oct-01 | International Coffee Day | Global |
| 5 | Oct-01 | World Vegetarian Day | Global |
| 6 | Oct-02 | Gandhi Jayanti | India |
| 7 | Oct-03 | National Techies Day | United States |
| 8 | Oct-03 | German Unity Day | Germany |
| 9 | Oct-04 | World Animal Day | Global |
| 10 | Oct-05 | World Teachers’ Day | Global |
| 11 | Oct-06 | German-American Day | United States |
| 12 | Oct-06 | National Noodle Day | United States |
| 13 | Oct-07 | National Poetry Day | United Kingdom |
| 14 | Oct-09 | Hangul Day | South Korea |
| 15 | Oct-09 | Leif Erikson Day | United States |
| 16 | Oct-10 | Double Ten Day | Taiwan |
| 17 | Oct-10 | World Mental Health Day | Global |
| 18 | Oct-11 | International Day of the Girl Child | Global |
| 19 | Oct-12 | Columbus Day | United States |
| 20 | Oct-12 | Thanksgiving Day | Canada |
| 21 | Oct-12 | Dia de la Raza | Latin America |
| 22 | Oct-13 | International Day for Disaster Reduction | Global |
| 23 | Oct-14 | World Standards Day | Global |
| 24 | Oct-15 | Global Handwashing Day | Global |
| 25 | Oct-16 | Boss’s Day | United States |
| 26 | Oct-16 | World Food Day | Global |
| 27 | Oct-17 | International Day for the Eradication of Poverty | Global |
| 28 | Oct-18 | Alaska Day | United States |
| 29 | Oct-19 | Diwali | India |
| 30 | Oct-20 | National Youth Day | Thailand |
| 31 | Oct-21 | National Apple Day | United Kingdom |
| 32 | Oct-22 | National Nut Day | United States |
| 33 | Oct-23 | Mole Day | United States |
| 34 | Oct-24 | United Nations Day | Global |
| 35 | Oct-24 | World Development Information Day | Global |
| 36 | Oct-25 | National Greasy Foods Day | United States |
| 37 | Oct-26 | National Mule Day | United States |
| 38 | Oct-27 | Navy Day | United States |
| 39 | Oct-27 | National Black Cat Day | United States |
| 40 | Oct-28 | National Chocolate Day | United States |
| 41 | Oct-29 | National Cat Day | United States |
| 42 | Oct-30 | Mischief Night | United States |
| 43 | Oct-30 | National Candy Corn Day | United States |
| 44 | Oct-31 | Halloween | Global |
| 45 | Oct-31 | Reformation Day | Germany |
| 46 | Oct-31 | All Hallows’ Eve | Global |
| 47 | Oct-31 | Samhain | Ireland |
| 48 | Oct-31 | Day of the Dead | Mexico |
| 49 | Oct-31 | Nevada Day | United States |
| 50 | Oct-31 | National Caramel Apple Day | United States |
| 51 | Oct-31 | World Cities Day | Global |
| 52 | October 1-31 | Breast Cancer Awareness Month | Global |
| 53 | October (last Monday) | Nevada Day | United States |
| 54 | October (varies) | Diwali (Festival of Lights) | India |
| 55 | October (varies) | Eid al-Fitr | Muslim Countries |
| 56 | October (varies) | Sukkot | Jewish Communities |
| 57 | October (varies) | Navratri | Hindu Communities |
| 58 | October (varies) | Oktoberfest | Germany |
| 59 | October (varies) | Festival of the Dead (Pchum Ben) | Cambodia |
| 60 | October (varies) | Grape Festival (Festa dell’Uva) | Italy |
| 61 | October (varies) | Columbus Day | United States |
| 62 | October (varies) | Canadian Thanksgiving | Canada |
| 63 | October (varies) | National Day (Chung Yeung Festival) | China |
| 64 | October (varies) | Chung Yeung Festival | Hong Kong |
| 65 | October (varies) | Chulalongkorn Day | Thailand |
| 66 | October (varies) | National Day (Hangeul Day) | South Korea |
| 67 | October (varies) | Simchat Torah | Jewish Communities |
| 68 | October (varies) | National Tree Planting Day | Sri Lanka |
| 69 | October (varies) | National Day (Republic Day) | Turkey |
| 70 | October (varies) | Independence Day | Cyprus |
| 71 | October (varies) | United Nations Day | Global |
| 72 | October (varies) | International Day for the Eradication of Poverty | Global |
| 73 | October (varies) | World Food Day | Global |
| 74 | October (varies) | World Mental Health Day | Global |
| 75 | October (varies) | International Day of the Girl Child | Global |
| 76 | October (varies) | National Coming Out Day | United States |
| 77 | October (varies) | International Day for Natural Disaster Reduction | Global |
| 78 | October (varies) | International Day of Rural Women | Global |
| 79 | October (varies) | World Osteoporosis Day | Global |
| 80 | October (varies) | International Stuttering Awareness Day | Global |
| 81 | October (varies) | World Polio Day | Global |
| 82 | October (varies) | World Psoriasis Day | Global |
| 83 | October (varies) | International Day for the Preservation of the Ozone Layer | Global |
| 84 | October (varies) | World Day for Audiovisual Heritage | Global |
| 85 | October (varies) | International Day of Non-Violence | Global |
| 86 | October (varies) | World Animal Day | Global |
| 87 | October (varies) | World Teachers’ Day | Global |
| 88 | October (varies) | World Habitat Day | Global |
| 89 | October (varies) | International Day for Disaster Reduction | Global |
| 90 | October (varies) | International Day of Rural Women | Global |
| 91 | October (varies) | World Mental Health Day | Global |
| 92 | October (varies) | International Day of the Girl Child | Global |
| 93 | October (varies) | United Nations Day | Global |
| 94 | October (varies) | World Polio Day | Global |
| 95 | October (varies) | International Stuttering Awareness Day | Global |
| 96 | October (varies) | International Day for the Eradication of Poverty | Global |
| 97 | October (varies) | World Food Day | Global |
| 98 | October (varies) | International Day for Natural Disaster Reduction | Global |
| 99 | October (varies) | World Osteoporosis Day | Global |
| 100 | October (varies) | International Day for the Preservation of the Ozone Layer | Global |
