The following is a list of observed commemorative days, that is, days that are used by various governments, groups and organizations to raise awareness of an issue, commemorate a group or event, or celebrate something.

• All Saints' Day - November 1
• All Souls' Day - November 2
• Australia Day - January 26
• ANZAC Day - April 25
• April Fools Day - April 1
• Arbor Day
• Armistice Day (also Remembrance Day) - November 11
• Ash Wednesday - depends on the date of Easter (as early as February 4 or as late as March 10)
• Bank Holiday
• Children's Book Day - April 2
• Chinese New Year
• Cities for Life Day - November 30
• D-Day - June 6 1944
• Darwin Day - February 12
• Day of the Dead - November 1(All Saints' Day) or November 2(All Souls' Day).
• Earth Day - April 22
• Easter - Western Christianity-Sunday March 22 to April 25 inclusive :: Eastern Christianity-April 4 and May 8 (1900 to 2100)
• European Day of Languages - 26 September, sponsored by the Council of Europe and European Union
• Fathers' Day
• Flag Day
• German Unity Day - October 3
• Groundhog Day - February 2
• Halloween - October 31
• Hangul Day - October 9 (South Korea) January 15 (North Korea)
• Holi
• Imbolc - beginning of February or at the first local signs of Spring
• International Day for Biological Diversity - May 22
• International Talk Like a Pirate Day - September 19
• Inventor's Day
• Kwanzaa - December 26 to January 1
• Labour Day
• Lantern Festival - 15th day of the 1st month in the lunar year in the Chinese calendar
• Lunar New Year - 1st day of the 1st month of the Chinese calendar.
• Mardi Gras
• Martin Luther King, Jr. Day - 3rd Monday of January
• May Day - May 1
• Melbourne Cup Day - 1st Tuesday in November
• Mole Day - October 23
• Mother's Day - May 11
• New Year's Day - January 1
• Pi Day - March 14
• Purim - 14th of the Hebrew month of Adar
• Queen's Birthday
• Saint Patrick's Day - March 17
• Shrove Tuesday - the day before Ash Wednesday
• Towel Day - May 25
• Transgender Day of Remembrance - November 20
• Valentine's Day - February 14
• Veterans Day - November 11
• Victory in Europe Day - May 7/May 8
• Victory over Japan Day - August 14/August 15
• Washington's Birthday - USA 3rd Monday of February.
• International Women's Day - March 8
• World Ocean Day - June 8

Sources

• 2005 National Health Observances
• National Health Information Center
• Office of Disease Prevention and Health Promotion
• U.S. Department of Health and Human Services, Washington, D.C.
• Stay Free Magazine
• Thinkquest

See also

• Awareness days
• International observance
• List of commemorative months
• List of environmental dates