1832day.year

The British Medical Association is founded as the Provincial Medical and Surgical Association by Sir Charles Hastings at a meeting in the Board Room of the Worcester Infirmary.

Sir Charles Hastings founds the Provincial Medical and Surgical Association, set to become the British Medical Association.
In 1832 Sir Charles Hastings convened physicians and surgeons in Worcester to establish the Provincial Medical and Surgical Association. The association aimed to improve medical education, professional standards, and public health in the British provinces. Hastings and his colleagues advocated for the regulation of medical practice and the exchange of scientific knowledge. The organization grew rapidly, attracting members from across the United Kingdom and Ireland. Renamed the British Medical Association in 1856, it became a leading voice for doctors and a driver of healthcare reform.
1832 British Medical Association Charles Hastings Worcester
1843day.year

Brunel's steamship the SS Great Britain is launched, becoming the first ocean-going craft with an iron hull and screw propeller, becoming the largest vessel afloat in the world.

Isambard Kingdom Brunel's SS Great Britain is launched as the first iron-hulled, screw-propelled ocean liner.
On July 19, 1843, the SS Great Britain was launched from Bristol, showcasing groundbreaking naval engineering by Isambard Kingdom Brunel. It was the first large ocean-going vessel built with an iron hull and powered by a screw propeller instead of paddle wheels. At 322 feet long, it was the largest ship afloat at its launch, heralding a new era in ship design and maritime travel. The SS Great Britain demonstrated greater speed, efficiency, and durability compared to traditional wooden ships. Its success influenced future shipbuilding and accelerated the development of global steam navigation.
1843 Brunel's steamship SS Great Britain screw propeller
1934day.year

The rigid airship USS Macon surprised the USS Houston near Clipperton Island with a mail delivery for President Franklin D. Roosevelt, demonstrating its potential for tracking ships at sea.

The USS Macon rendezvoused with the USS Houston near Clipperton Island in 1934, showcasing airships’ naval reconnaissance potential.
In 1934, the U.S. Navy dirigible USS Macon performed a demonstration mission off Clipperton Island by delivering mail to the cruiser USS Houston. This exercise illustrated the airship’s ability to track and support naval vessels far at sea. Commissioned in 1933, the Macon served as a flying aircraft carrier, capable of launching Sparrowhawk fighters. The rendezvous for President Roosevelt’s mail showcased its role in communication and reconnaissance. Enthusiasts hailed it as a marvel of aeronautical engineering during the interwar period. Although airships would soon decline after high-profile disasters, the Macon’s mission underscored the era’s technological ambitions.
1934 USS Macon USS Houston Clipperton Island Franklin D. Roosevelt
1963day.year

Joe Walker flies a North American X-15 to a record altitude of 106,010 meters (347,800 feet) on X-15 Flight 90. Exceeding an altitude of 100 km, this flight qualifies as a human spaceflight under international convention.

On July 19, 1963, test pilot Joe Walker flew the North American X-15 to 106,010 meters, achieving the first human spaceflight by altitude convention.
Pilot Joe Walker set an altitude record aboard the North American X-15 on Flight 90, reaching 106,010 meters above Earth’s surface. This mission exceeded the Kármán line of 100 kilometers, meeting the international definition of spaceflight. The rocket-powered hypersonic aircraft provided critical data on re-entry heating and high-altitude flight control. Walker’s achievement marked one of the earliest human spaceflight missions under U.N. conventions, demonstrating the X-15’s unique capabilities. The flight profile included a 350-second engine burn followed by a ballistic coast to peak altitude. On descent, the X-15 glided back to Rogers Dry Lake in California, completing a landmark test in aeronautics. The success bolstered U.S. confidence in both piloted and unpiloted space programs during the early Cold War space race. Flight 90’s accomplishments contributed to the development of the Space Shuttle program and modern hypersonic research.
1963 Joe Walker North American X-15 X-15 Flight 90 human spaceflight
1977day.year

The world's first Global Positioning System (GPS) signal was transmitted from Navigation Technology Satellite 2 (NTS-2) and received at Rockwell Collins in Cedar Rapids, Iowa, at 12:41 a.m. Eastern time (ET).

The first GPS signal was transmitted from NTS-2 and captured in Iowa, marking a milestone in satellite navigation.
In the early hours of July 19, 1977, the U.S. launched Navigation Technology Satellite 2, which broadcast the inaugural GPS signal. Rockwell Collins engineers in Cedar Rapids, Iowa, successfully received and decoded the transmission at 12:41 a.m. ET. This achievement demonstrated the feasibility of a space-based positioning system for both military and civilian use. The technology would later revolutionize global navigation, enabling precise location tracking anywhere on Earth. GPS has since become integral to aviation, maritime operations, mapping, and everyday smartphone navigation. The success of NTS-2 laid the groundwork for the deployment of a full satellite constellation.
1977 Global Positioning System Rockwell Collins Cedar Rapids, Iowa
1983day.year

The first three-dimensional reconstruction of a human head in a CT is published.

The first 3D reconstruction of a human head using CT technology was published, advancing medical imaging.
In 1983, researchers unveiled the inaugural three-dimensional reconstruction of a human head using computed tomography data. Prior to this achievement, CT scans provided only flat, cross-sectional images. By integrating multiple slices, scientists created a volumetric model that allowed for unprecedented visualization of cranial anatomy. This breakthrough improved diagnostic accuracy for tumors, fractures, and vascular conditions. The technique also paved the way for surgical planning and virtual simulations. It marked a pivotal moment in radiology, triggering further innovations in 3D imaging and, later, the development of MRI-based reconstructions.
1983 three-dimensional reconstruction CT

2024 ─ A faulty software update by CrowdStrike, an American cybersecurity company, causes global computer outages.

A faulty CrowdStrike software update on July 19, 2024, triggered widespread computer outages across multiple industries worldwide.
On July 19, 2024, cybersecurity firm CrowdStrike released a routine software update for its Falcon endpoint protection platform. An unnoticed bug in the update caused critical system processes to crash on thousands of networks, disrupting operations in finance, healthcare, and government agencies. Companies reported loss of access to essential data and services, prompting emergency rollback protocols and manual interventions. CrowdStrike engineers worked around the clock to develop and distribute a corrective patch within hours. The incident exposed the vulnerabilities inherent in centralized security solutions and the cascading effects of a single point of failure. It spurred calls for more rigorous testing, diversified security providers, and improved incident response planning. Businesses reevaluated their dependence on critical cybersecurity vendors in the wake of the widespread outage.
2024 software update CrowdStrike cybersecurity global computer outages