Holidays and Observances
Alphabetical Listing of O Holidays

Below, you can find a Holidays and Observances Alphabetical Listing of US Holidays and World Holidays and Observances that start with O.  We are still adding names to the list, so more information will be coming. 

After we complete the summary pages on the site, we will start working on a detailed page(s) for each Holidays and Observance. Once a page is completed for each Holiday or Observance, it will be linked up below, as well as it's related Daily Holidays page. (that should keep us busy for the next 20 years or so!!)

Search for Holidays Alphabetically:

A, B, C, D, E, F, G, H, I, J, K, L, M, N, N-Pg2 O, P, Q, R, S, T, U, V, W, X-Y-Z

Organic Harvest Month is the Entire Month of September!

Organic Harvest Month is the Entire Month of September! I've been growing my own Organic Vegetables over the last couple of years. Not only does it save a lot of money, but there is nothing better than going outside to pick stuff for dinner! This was one day's haul - with this many tomatoes, I took off the skins and ran everything through my juicer.  I was then able to freeze the juice/pulp in freezer quart size bags which are perfect for taking out to make pasta sauce or any type of soup. For excess zucchini - I peeled them and just grated them and put in freezer baggies to add to soups and sauces.

O Holidays and Observances

  • O. Henry Pun-Off Day - May 17, 2024
  • Oatmeal Monday - February 12, 2024 (Second Monday in February)
  • Oatmeal Month - January
  • Occupational Safety and Health Professionals Day - April 28, 2024
  • Occupational Therapy Month - April
  • Odd Day - (Last one was 9-11-13 - three consecutive odd numbers)
  • Official Lost & Found Day - December 13, 2024 (Second Friday in December)
  • Oklahoma City Bombing Commemoration Day - April 19
  • Okra Month - June
  • Oktoberfest - September 21, 2024 - October 6, 2024 Beer Festival in Munich, Germany. This festival is now held all over the World. Also, check out our Holidays in Germany page!
  • Old Time Fiddlers Week - June 17-22, 2024 (Third Week in June)
  • Old Time Player Piano Day - May 27
  • Old Time Player Piano Weekend - May 24-26, 2024 (Memorial Day Weekend)
  • Older Americans Mental Health Week - May 19-25, 2024 (Last Full Week in May)
  • Older Americans Month - May
  • One Day Without Shoes Day - May 10
  • One-on-One Month - September
  • Onion Month - August
  • Open that Bottle Night - February 24, 2024 (Last Saturday in February)
  • Operating Room Nurse Awareness Week - November 10-16, 2024
  • Operation Red Wings Observance - June 28
  • Operation Safe Driver Week - July 7-13, 2024
  • Operation Santa Paws - December
  • Oral, Head and Neck Cancer Awareness Week - April 16-22, 2024
  • Orange Month - August
  • Orangutan Caring Week - November 10-16, 2024
  • Organ / Tissue Donor Awareness Week - Last Week of April
  • Organic Beer Fest - June 25-27
  • Organic Harvest Month - September
  • Organize Your Home Office Day - March 12, 2024 (Second Tuesday in March)
  • Organize Your Medical Information Month - October
  • Orphan Sunday - November 10, 2024 (Second Sunday in November)
  • Orthodox Easter - May 5, 2024 
  • Orthodox Easter Monday - May 6, 2024 
  • Orthodox Forgiveness Sunday - March 17, 2024
  • Orthodox Good Friday - May 3, 2024
  • Orthodox Holy Saturday - May 4, 2024
  • Orthodox Holy Week - March 24 - April 1, 2024 
  • Orthodox Lent - February 22 - April 8, 2023
  • Orthodox Meatfare Sunday - March 10, 2024
  • Ostara - March 19, 2024 (Spring Equinox) 
  • Osteoporosis Prevention Month - May
  • Ovarian Cancer Awareness Month - September
  • Own Business Day - October 8, 2024 (Second Tuesday in October)
  • Own Your Share of America Day - June 14, 2024 (Closest Weekday to June 14)

Search for Holidays Alphabetically:

A, B, C, D, E, F, G, H, I, J, K, L, M, N, N-Pg2 O, P, Q, R, S, T, U, V, W, X-Y-Z

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