Week One
- 4-H Week
- Carry a Tune Week ~ Week with the 7th of October in it
- Customer Service Week
- Death Penalty Focus Week ~ Week with the 10th of October in it
- Drive Safely Work Week ~ First full Mon-Fri Week of October
- Emergency Nurses Week
- Financial Planning Week ~ First full Mon-Sun Week of October
- Get Organized Week
- Getting the World to Beat a Path to Your Door Week
- Great Books Week ~ First full Week of October
- Health Care Food Service Week ~ First Week of October
- Health Information and Technology Week
- Heimlich Heroes Week ~ First full Mon-Fri Week of October
- Kids’ Goal Setting Week
- Mental Illness Awareness Week ~ First full Week of October
- Metric Week Week with the 10th of October in it
- Mystery Series Week ~ First full Week of October
- No Salt Week
- Nuclear Medicine and Molecular Imaging Week ~ First full Week of October
- Physicians Assistant Week
- Primary Cary Physicians Week
- Post Card Week (International) ~ First full week of October
- Rainforest Week (World)
- Space Week (World)
- Spinning and Weaving Week
- Storytelling Weekend
- Take Your Medicine Americans Week
- Trichotillomania, Skin Picking & Related BFRB Awareness Week
- Universal Children’s Week
- Walk Your Dog Week
- Work from Home Week ~ First full week of October
Week Two
- Bone and Joint Health Awareness Week ~ Second full week of October
- Bullying Bystanders Unite Week ~ Second full week of October
- Chestnut Week ~ Second full week of October
- Choose to be Great Week
- Drink Local Wine Week
- Earth Sciences Week ~ Second full week of October
- Fire Prevention Week
- Food Bank Week ~ Week containing the 16th of October
- Health Education Week
- Infection Prevention Week
- Meditation Week ~ Second full week of October
- Pet Peeve Week
- School Lunch Week ~ Begins second Monday in October
- Sukkot
- Teen Read Week ~ Week with Columbus Day in it
- Veterinary Technicians Week
Week Three
- Asexuality Week
- Business Women’s Week ~ Third full week in October
- Character Counts Week ~ Third full week in October
- Chemistry Week~ Third full week in October
- Collegiate Alcohol Awareness Week ~ Third full week in October
- Food & Drug Interactions and Awareness Week
- Forest Products Week ~ Begins third Sunday in October
- Freedom from Bullies Week ~ Third full week in October
- Friends of Libraries Week ~ Third full week in October
- Lead Poisoning Prevention Week
- Massage Therapy Week ~ Last full week in October
- Medical Assistants Recognition Week ~ Third full week in October
- Nuclear Science Week ~ Last full week in October
- Pastoral Care Week ~ Last full week in October
- Pharmacy Week ~ Third full week in October
- Pro Bono Week
- Respiratory Care Week ~ Last full week in October
- Rodent Awareness Week ~ Third full week in October
- Save for Retirement Week ~ Third full week in October
- School Bus Safety Week ~ Third full week in October
- Spiritual Care Week ~ Last full week in October
- Teen Drivers Safety Week ~ Third full week in October
- YWCA Week Without Violence ~ Third full week in October
Week Four
- Disarmament Week
- Dyslexia Association Reading Week (International)
- Freedom of Speech Week ~ Third full Mon-Sun week in October
- Give Wildlife a Brake Week ~ Last full week in October
- Kids Care Week
- Magic Week (International)
- Midwifery Week
- Prescription Errors Education & Awareness Week
- Red Ribbon Week ~ Last 9 days of October
- World Origami Days
October
October Daily Holidays
October Monthly Holidays