Science Technology observances

ARPANET first-message anniversary

29 October 1969 · United States / DARPA internet-history context

DARPA says the first computer-to-computer signal on ARPANET was sent between UCLA and Stanford Research Institute on October 29, 1969. The SEO title is treated as a historical-anniversary a…

Astronomy Day

25 April and 19 September in 2026 · Astronomical League / international outreach event

The Astronomical League’s Astronomy Day calendar lists both Spring and Autumn Astronomy Days; for 2026 they are 25 April and 19 September.

Computer Security Day

30 November · International/institutional cybersecurity-awareness tradition

University cybersecurity guidance identifies Computer Security Day as an annual November 30 observance dating to 1988.

Cyber Monday

Monday after U.S. Thanksgiving · United States-origin / ecommerce shopping event

Shopify identifies Cyber Monday as the Monday after Thanksgiving and traces the term to Shop.org in 2005; Georgetown documents Ellen Davis and the Shop.org team naming the post-Thanksgiving…

Day of the Programmer (Russia)

256th day of the year — 13 September, or 12 September in leap years · Russia / official professional holiday

Russian Presidential Decree No. 1034 established Day of the Programmer on the 256th day of the year: September 13, or September 12 in leap years.

Digital Learning Day

Second Thursday in February; 12 February 2026 verified · United States-centered education community / All4Ed organizer

All4Ed’s current Digital Learning Day page asks participants to mark the second Thursday in February and lists February 12 for 2026.

Digital Nomad Day

8 August · United States-origin / digital-nomad community observance

Rootless Living states that it created Digital Nomad Day and held the second annual observance on August 8, 2021; National Today independently lists August 8 annually.

Edinburgh Science Festival

4–19 April 2026 · Edinburgh, Scotland / 2026 festival

Edinburgh Science’s own 2026 material identifies the Edinburgh Science Festival as running 4–19 April 2026 and describes the 2026 theme as Going Global.

Education Freedom Day (Digital Freedom Foundation historical program)

18 January 2014 first documented edition; later scheduling evolved · Digital Freedom Foundation / historical free-education and open-knowledge program

Digital Freedom Foundation material announced the first Education Freedom Day for 18 January 2014. DFF’s current program history lists Education Freedom Day among past Freedom Days rather t…

IEEE Global Engineering Day

13 May · International informal engineering recognition associated with IEEE communities

IEEE community event infrastructure shows observance activity around IEEE Global Engineering Day, while established calendar sources consistently place the named observance on May 13. The e…

International Day for Digital Learning

19 March · UNESCO international day

Designated by UNESCO Member States in 2023

International Day of Engagement in Science for Sustainable Development

27 November · UNESCO international day

Proclaimed by UNESCO General Conference in 2025

International Day of Human Space Flight

12 April · United Nations / international observance

A/RES/65/271

International Day of Mathematics

14 March · UNESCO international observance

International Day of Science, Technology and Innovation for the South

16 September · United Nations / international observance

A/RES/78/259

International Day of Women and Girls in Science

11 February · United Nations international observance

A/RES/70/212

International Digital Adoption Professionals Day

Last Thursday of July (30 July in 2026) · International / WalkMe-created digital-adoption professional observance

WalkMe’s launch announcement establishes International Digital Adoption Professionals Day on the last Thursday of July.

International Medical Science Liaison Day

27 March · International / Medical Science Liaison Society professional-recognition day

The Medical Science Liaison Society identifies March 27 as International MSL Day and states that annual activities began March 27, 2020. The inventory title is treated as a descriptive alia…

International Systems Engineer Day

Last Friday of November · International / creator-led professional appreciation observance

The observance’s creator site states that it was founded in 2012 and is celebrated annually on the last Friday of November.

International Week of Science and Peace

Week in which 11 November falls (9–15 November on the UN calendar) · United Nations international week

A/RES/43/61

International Women in Engineering Day

23 June · Organizer-backed global engineering campaign

Women’s Engineering Society (WES)

Introduce a Girl to Engineering (Girl Day)

Organizer-set date during Engineers Week; 26 February 2026 · DiscoverE engineering outreach campaign

DiscoverE, official Girl Day organizer

Macintosh launch anniversary

24 January · Technology-history anniversary / original Macintosh release

The Computer History Museum records that Apple released the Macintosh on 24 January 1984.

Math 2.0 Day

8 July · International / informal mathematics-and-technology observance

Timeanddate lists Math 2.0 Day annually on July 8, and the U.S. Air Force independently published an official graphic titled “July 8 – Math 2.0 Day.”

Math Storytelling Day

25 September · International / Natural Math community-created educational observance

Natural Math’s first-party toolkit says Math Storytelling Day is celebrated on September 25 and explains how Maria Droujkova and Sue VanHattum developed the observance.

Mathematics and Statistics Awareness Month

April annually; April 2026 current edition · Joint Policy Board for Mathematics / professional awareness program

The official Mathematics and Statistics Awareness Month site states that the observance is held each April and includes current 2026 activities; it is a program of the Joint Policy Board fo…

National Clean Out Your Computer Day

Second Monday in February · United States / informal computer-maintenance observance

Timeanddate and National Day Calendar both place the observance on the second Monday in February and attribute its promotion to the Institute for Business Technology around 2000.

National Internet Friends Day

13 February · United States / informal online-friendship observance

National Today and Days Of The Year independently place National Internet Friends Day on February 13 each year.

National Ladies Learning Code Day

Organizer-scheduled annual event; cited editions include 26 September 2020 and 6 November 2021 · Canada / Canada Learning Code program event

Canada Learning Code’s own archives document National Ladies Learning Code Day on different dates across editions: September 26 in 2020 and November 6 in 2021. Its current landing page is a…

National Mathematics Day (India)

22 December · India / Government of India observance marking the birth anniversary of Srinivasa Ramanujan

The Government of India announced 22 December, Ramanujan’s birthday, as National Mathematics Day in 2011; a later Press Information Bureau release states that National Mathematics Day is ce…

National No-Code Day

11 March · United States-origin / Zapier-created no-code technology observance

Zapier states that it launched National No-Code Day as an annual celebration and that it is observed every March 11.

National Public Science Day

17 February · United States / AAAS-linked public-science outreach observance

A 2000 NCAR/UCAR release says National Public Science Day was sponsored by AAAS and celebrated on February 17; current observance references continue to use February 17 annually.

National Science Day (India)

28 February annually · India / national science observance

India’s Department of Science and Technology states that National Science Day is celebrated every year on February 28 to commemorate the Raman Effect; Government of India 2026 material conf…

National Science Fiction Day

2 January · Literary / science-fiction reader observance associated with Isaac Asimov’s birthday

MIT Press describes National Science Fiction Day as marked on 2 January in honor of Isaac Asimov’s birthday.

National Science Week

15–23 August 2026 · Australia / national 2026 celebration

Australia’s Department of Education and the National Science Week site both give 15–23 August 2026 for the country’s annual celebration of science and technology.

National Space Day

23 August each year · India

ISRO states that 23 August was declared National Space Day to commemorate Chandrayaan-3’s successful lunar landing and marked the third National Space Day in 2026

National Technology Day (India)

11 May annually · India / national science and technology observance

India’s Department of Science and Technology identifies 11 May as National Technology Day, commemorated annually following the 1998 technology achievements.

National Thermal Engineer Day

24 July annually · United States / Advanced Thermal Solutions industry observance

Advanced Thermal Solutions identifies July 24 as National Thermal Engineer Day and is the sponsoring organization behind the observance.

Safer Internet Day

Second Tuesday of February · Global digital-safety initiative

European Commission Better Internet for Kids / Insafe network

Samuel F. B. Morse birthday anniversary

27 April · Technology/history anniversary anchored to Samuel F. B. Morse’s birth date

The Smithsonian National Portrait Gallery records Samuel Finley Breese Morse’s birth date as 27 April 1791 and identifies him with the invention of the telegraph.

Space Exploration Day

20 July 2026 in the cited U.S. presidential message · U.S. presidential commemoration tied to space exploration and the Apollo 11 anniversary

GovInfo records a presidential message titled for Space Exploration Day with event date 20 July 2026, providing current federal executive-branch evidence for the named commemoration.

Spring Astronomy Day

25 April in 2026 · Astronomical League / astronomy outreach observance

The Astronomical League lists Spring Astronomy Day on 25 April 2026 and describes the spring observance as a Saturday between mid-April and mid-May near or before the first-quarter Moon.

U.S. full-power digital television transition anniversary

12 June 2009 · United States / FCC full-power television transition

The FCC states that Congress set June 12, 2009 as the deadline for full-power television stations to stop analog broadcasting; the page title is therefore best treated as a historical-anniv…

World Coding Day

29 October · UNESCO international day

Designated by UNESCO Member States; first celebrated in 2024

World Computer Literacy Day

2 December annually · NIIT-led global digital-literacy campaign

NIIT’s first-party campaign material identifies World Computer Literacy Day on 2 December and describes its recurring digital-literacy movement.

World Day Against Cyber Censorship

12 March annually · Global / Reporters Without Borders campaign

Reporters Without Borders identifies 12 March as World Day Against Cyber Censorship and states that RSF initiated the observance.

World Engineering Day for Sustainable Development

4 March · UNESCO international day

Proclaimed by UNESCO in 2019

World Maths Day

25 March in the 2026 edition · 3P Learning / Mathletics global school mathematics event

3P Learning publishes World Maths Day as a global mathematics event and gives the date for the 2026 edition

World Science Day for Peace and Development

10 November · UNESCO / international observance

UNESCO 31 C/Resolution 20

World Space Week

4–10 October · United Nations international week

A/RES/54/68

ZIP Code launch anniversary

1 July · United States / anniversary of the nationwide ZIP Code launch in 1963

USPS states that Postmaster General J. Edward Day announced the ZIP Code would launch on 1 July 1963.