Social, celebratory and often informal observances built around shared activities, interests or community participation.
Talkspace launched National Check Your Coverage Day for January 21, 2025, states that it founded the day to encourage early-year review of mental-health benefits, and promoted the January 2…
FAA Safety Briefing states that National Checklist Day rolls around every October 30 and explains the date through the October 30, 1935 Model 299 crash that prompted formal aviation checkli…
Timeanddate and Checkiday independently attribute the observance to the Personal Computer Museum in Brantford in 2010; Checkiday preserves a Wayback source to the museum’s original pcmuseum…
A January 1992 Washington Post report identifies Anne Moeller as the person who got National Clean-Off-Your-Desk Day entered in Chase’s Annual Events roughly a decade earlier, while current…
The official National CleanUp Day organization states that the observance takes place every year on the third Saturday in September.
Kiribati’s Public Service Office lists the observance in the national public-holiday calendar, while the Ministry of Internal Affairs cultural division explains that it merged earlier cultu…
U.S. Department of Energy material lists National Cut Your Energy Costs Day on January 10, with municipal-utility and energy-industry sources independently using the same annual date.
Archived White House material establishes the first nationwide National Day of Civic Hacking on 1–2 June 2013. Later White House and Code for America sources document continuing organizer-l…
Comfort Keepers states that it created National Day of Joy in 2019, held the first annual observance on June 26, 2019, and continues to observe it on the last Wednesday in June.
Craft Box Girls states that its team launched the first National DIY Day on April 2, 2016 and established April 2 as the annual date.
Ramp’s October 15, 2025 first-party launch creates National Expense Report Day; National Day Archives independently identifies Ramp as creator in 2025 and records October 15 annual recurren…
U.S. Figure Skating states that it founded National Get Up Day and has celebrated it annually on 1 February, with the campaign centered on perseverance and getting back up after setbacks.
2-10 Home Buyers Warranty states that National Home Warranty Day is celebrated every February 10, identifies 2-10 as founder, and credits employee Tahlia Hersch with founding the day in 201…
Sri Lanka National Archives states that Ceylon was declared an independent state on February 4, 1948 after the Ceylon Independence Act 1947 process. The Central Bank of Sri Lanka lists Febr…
National Day Calendar identifies Liran Hirschkorn as the 2014 submitter and May 2 as the recurring private observance date; exact first public edition remains unresolved.
Landry Champlin’s current first-party biography says she started National Live Fearless Day; National Day Archives identifies Champlin as the creator in 2020 and September 2 as the annual d…
National Day Calendar preserves creator Jack Etzel’s first-person account of originating the observance in Pittsburgh in the 1980s and contacting Chase’s Calendar, while Pittsburgh Magazine…
National Day Calendar consistently places National Make Your Bed Day on September 11 and explicitly notes that its origin is unidentified.
Creator-authored material identifies Greshun De Bouse as founder of National Making the First Move Day; contemporaneous 2019 reporting documents her work to establish the April 7 observance…
Current observance references identify January 16, Harold Pullman Coffin as the 1972 proposer and 1973 as the first-observance year; long-running Chase’s Calendar coverage corroborates the…
OLAPLEX first-party material describes the 2020 observance as the first-ever National OLAPLEX Day, says June 25 marks the inception of OLAPLEX, and frames it as an annual brand-community ce…
Current historical references identify Lisa Kanarek as creator, trace the observance to 1992, and document a move from the fourth Tuesday in March (1992–1999) to the second Tuesday beginnin…
Stratco and Cancer Council materials establish the 2019 Australian launch and first-Saturday-of-December recurrence; current exclusive stewardship remains unresolved.
Kentucky State University documents the inaugural National Pawpaw Day on 19 September 2019 and establishes the third Thursday of each September for pawpaw awareness.
Leslie’s first-party material identifies National Pool Opening Day as the last Saturday in April and documents current company participation; founder and first-edition claims remain unresol…
The Hesch Firm-issued 2018 founder release establishes March 6 and Joel D. Hesch as founder. The campaign title itself uses “General Service Administration,” while official GSA material ide…
The Hesch Firm-issued May 2018 founder release states the observance is celebrated May 8 and says Joel D. Hesch formed it in 2018. DOJ material is retained only for current False Claims Act…
The Hesch Firm’s contemporaneous April 5, 2018 announcement identifies Joel D. Hesch as creator and April 10 as the observance date; current IRS sources provide the authoritative reporting…
National Day Archives identifies October 2, a 2017 start and The Hesch Firm as creator; current Hesch Firm material corroborates the campaign subject, while HHS-OIG supplies current officia…
FBI Phoenix explicitly recognized National Report Medicare Fraud Day on September 12, while observance records attribute the campaign to former DOJ attorney Joel Hesch and the Hesch Firm.
The Hesch Firm-issued June 2018 founder release establishes July 2, says Joel D. Hesch formed the observance in 2018, and frames it as a private fraud-awareness campaign. Current DoD OIG ma…
A creator-provided Hesch Firm release identifies January 23 as National Report Pharmaceutical Fraud Day and says Joel D. Hesch formed the observance, with the campaign beginning in 2017.
The Hesch Firm-issued June 2018 founder release establishes June 26 and says Joel D. Hesch formed the observance in 2018. Current Acquisition.gov material is used for the Trade Agreements A…
National Day Archives currently records August 21 and attributes the observance to The Hesch Firm / Joel D. Hesch with a 2017 start. No surviving first-party Hesch founder source for this s…
American Rivers operates National River Cleanup® as a network of cleanup events held throughout the year; organizers register an event date, so there is no single universal recurring Nation…
Capital One states that it founded National Savings Day and celebrates it yearly on October 12; National Day Calendar records annual observance beginning in 2017.
NHTSA identifies National Seat Check Saturday as the closing Saturday of Child Passenger Safety Week. The agency lists September 26 for 2026 and different dates in other editions, so the da…
Silence the Shame identifies 5 May as Silence the Shame Day, focused on reducing stigma and encouraging open discussion around mental wellness.
A founder-issued press release from Compassionate Dental Care states that Dr. Tim Stirneman and Jim Wojdyla founded National Smile Day on 31 May.
StickerGiant identifies National Sticker Day on 13 January and states that it created the day in 2016.
The American Lung Association describes National Take the Stairs Day as an annual observance on the second Wednesday of January.
National Day Calendar and elevator-industry company TK Elevator independently define the recurrence as the last Friday in July rather than a fixed month/day.
National Day Archives, AnyDayGuide and Hallmark planning material independently place National Thank You Note Day on December 26.
Aon Affinity Travel states that its travel practice started National Travel Insurance Claims Day in 2019; USTIA recognizes the recurring May 14 observance. Coverage and claim outcomes remai…
Detroit Hives identifies itself as the founder of National Urban Beekeeping Day on 19 July; Detroit public records also cite Michigan House recognition of the date.
A December 1995 Washington Post/Newsday report identifies December 26, quotes Rev. Kevin C. Zaborney, and states that he started National Whiner’s Day in 1986; National Day Calendar preserv…
Nevada Revised Statutes / State of Nevada holiday guidance
5 U.S.C. §6103 lists New Year’s Day, January 1, as a legal public holiday for the federal system; OPM applies the federal observed-day rules, while Congressional Research Service history tr…
The first-party Wellcat Holidays calendar lists No Homework Day on May 6 and identifies the holiday collection as created by Thomas and Ruth Roy.
The first-party Wellcat Holidays calendar lists No Socks Day on May 8 and identifies the holiday collection as created by Thomas and Ruth Roy.
The official organizer traces the show to 1937; North Dakota law treats it as an annual Valley City exhibition; current edition dates remain schedule-specific.
The Oklahoma City National Memorial & Museum maintains an annual April 19 Remembrance Ceremony and NPS anchors the memorial scope. Proclamation 6880 designated April 19, 1996 as a one-time…
City of Boston material documents the 2015 beginning of One Boston Day, a 2016 mayoral proclamation permanently designating April 15, and continuing City stewardship in 2026.
Optimist International states that Optimist Day is celebrated annually on the first Thursday of February and traces the organization’s adoption of that rule to 2013.
Organization of American States
Official Pokémon sources identify February 27 as Pokémon Day because the first Pokémon video games launched in Japan on February 27, 1996; contemporaneous 2016 reporting documents The Pokém…
Government of Slovenia
Queensland Government
Red Hat Society first-party material identifies 25 April as its official birthday and the anniversary of the first gathering on 25 April 1998.
Texas legislative records establish the 1836 historical anchor, the 1874 state-holiday action and current Government Code §662.003(b).
The Photo Managers states it has led the Save Your Photos effort since 2014; founder Cathi Nelson describes Save Your Photos Day as the original last-Saturday-in-September format before exp…
Japan National Tourism Organization material describes Setsubun observances held each year on 3 February at the cited tradition site.
Botswana’s 1992 declaration, 2006 Public Holidays Act and current government calendar establish the July 1 public-holiday lifecycle separately from the 1921 birth anniversary.
The Irrigation Association describes Smart Irrigation Month as an annual initiative held each July and published current 2026 campaign materials.
The Stephen Lawrence Day Foundation states that the day takes place every year on 22 April, the anniversary of Stephen Lawrence’s death, and its timeline records that Prime Minister Theresa…
Presidential Decree No. 76 of 25 January 2005 established the Day of Russian Students on 25 January; Moscow State University materials document the older Tatiana Day/student tradition and t…
5 U.S.C. 6103/OPM establishes Thanksgiving Day on the fourth Thursday in November. National Archives documents the 1789 federal proclamation, 1863 annual tradition, 1939 shift and 1941 cong…
Spain’s official tourism material identifies Día de Reyes on 6 January and describes the Three Kings tradition.
Brazilian federal law makes 21 April a national holiday; Law 1,266/1950 established the Tiradentes holiday, Law 4,897/1965 added civic-patron and annual-commemoration provisions, and Law 10…
Singapore Ministry of Defence / Total Defence programme
Mongolian government sources identify Tsagaan Sar (White Moon/Lunar New Year) as a traditional national holiday. Mongolia’s labor-law material designates the first three days of the first s…
Tynwald’s official pages establish the national-day identity, the usual 5 July date with following-Monday adjustment when 5 July falls on a weekend, and the 1417 written procedure that reco…
