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There are only two moments each year when the Sun lies directly above Earth’s equator. These moments are the equinoxes, when, at any location, the lengths of day and night are roughly equal. The March equinox happens sometime between March 19 and 21. The September equinox occurs sometime between September 21 and 24.
In the Northern Hemisphere, the March equinox marks the beginning of Spring and the September equinox the beginning of Fall. The reverse takes place in the Southern Hemisphere.

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History Series CONTRIBUTOR

Why do we have Time Zones? || Kudos365 History Series 

How the railroad transformed something as natural as noon into a worldwide system

For most of human history, time was local. Noon arrived when the sun reached its highest point in the sky. A town set its clocks accordingly, and another town some distance away did the same. Because longitude affects when the sun reaches its highest point, neighboring communities could have slightly different times.
For centuries, that hardly mattered. Most people traveled slowly, communication over long distances took time, and there was little reason for clocks hundreds of miles apart to agree. Then the railroad changed the equation.

When Local Time Became a Problem

By the nineteenth century, railroads were carrying people and goods rapidly between communities that kept different local times. In North America, railroads eventually had to contend with dozens of different railway and local time standards.
A passenger trying to read a timetable could encounter one time in the city of departure, another at the destination, and perhaps still another being used by the railroad itself.
What had once been harmless local variation had become an obstacle to operating an interconnected society. The solution was deceptively simple: instead of changing the clock continuously as one traveled east or west, large geographic areas would agree to use the same time. The modern time zone was emerging.

The Day the Clocks Changed

Railroad officials in the United States and Canada took the decisive step. William F. Allen, an editor of a prominent railway guide, helped develop a standardized system for the North American railroads. On November 18, 1883, most U.S. and Canadian railroads adopted Standard Railway Time, replacing a confusing collection of local and railroad times with a small number of standardized zones.
The adjustment produced an unusual experience in some communities. Clocks reached local noon and were then reset to reach noon again under the new standard. The occasion became known as the “Day of Two Noons.” 
The railroads had no authority to order every American to change a clock. But their network was becoming so important to commerce and everyday life that communities increasingly adopted railroad time themselves. Technology had effectively created a new social standard before government formally established one.

Turning a Railroad Solution into a World System

The problem extended well beyond North America. As steamships, telegraphs, international commerce and increasingly precise navigation connected distant parts of the world, countries also needed a common geographic reference for longitude and time.
One influential advocate was Canadian railway engineer Sandford Fleming, who promoted a worldwide system divided into 24 zones. Fleming was neither the first nor the only person to propose standardized world time, but he became an important advocate for international reform. 
In 1884, representatives gathered in Washington, D.C., for the International Meridian Conference. They recommended establishing the meridian through Greenwich, England, as the world's prime meridian and using it as the common starting point for longitude and universal time. Countries gradually developed their own standardized systems around this framework.
In the United States, Congress did not formally establish standard time in federal law until the Standard Time Act of 1918, decades after the railroads had introduced their system. 

The Map Is Not as Neat as the Idea

In theory, dividing a 24-hour day around the 360 degrees of the Earth suggests 24 zones averaging 15 degrees of longitude each.
Look at an actual time-zone map, however, and the boundaries zigzag. That is because people don't live according to longitude alone. Countries and communities have adjusted their time zones to accommodate borders, commerce, transportation and political preferences. Some nations span several zones; others have chosen one time for the entire country. Some regions use offsets of a half-hour or even 45 minutes rather than a full hour. The result is a fascinating compromise between astronomical time and human convenience. (NIST)

The World the Time Zone Created

The importance of standardized time extends far beyond knowing when to change a watch while traveling. Modern aviation depends upon coordinated time. So do global financial markets, telecommunications, shipping, broadcasting, scientific observation and computer networks. A video conference can bring together people on several continents because everyone can translate a scheduled moment into local time. Even our everyday expectation that clocks should agree is historically unusual.
Before standardized time, the clock largely described where you were. Today, it helps coordinate where everyone else is.

Historical Significance

Time zones are a small but revealing example of something that happened repeatedly as the modern world developed. New technologies connected communities that had once functioned largely independently. Those connections then required common standards—of time, measurement, communication and countless other things.
The railroad didn't invent time. It created a world in which local time was no longer enough. And from that practical nineteenth-century problem emerged an invisible system that now helps billions of people coordinate their lives every day.
That is one of the quiet ways the past still shapes us.

History Series © 2026–Present Kudos 365. All Rights Reserved.

NASA Series CONTRIBUTOR

NASA Astronomy Picture of the Day:

When does a nebula look like a comet? In this crowded starfield covering over two degrees within the high-flying constellation of the Swan (Cygnus), the eye is drawn to the Cocoon Nebula. A compact star forming region, the cosmic Cocoon punctuates a nebula bright in emission and reflection on the lower right, with a long trail of interstellar dust clouds to the left, making the entire complex appear a bit like a comet. Cataloged as IC 5146, the central bright head of the nebula spans about 10 light years, while the dark dusty tail spans nearly 100 light years. Both are located about 2,500 light years away. A bright star near the colorful nebula's center likely supplies power and helps clear out a cavity. The long dusty filaments of the tail, although dark in this visible light image, hide stars in the process of formation. The featured image was captured in July from Death Valley, California, USA.

Photo by Piotr Czerski

Photography Series CONTRIBUTOR
Quotable Series CONTRIBUTOR

Herbert Bayard Swope (1882 - 1958) American editor, journalist. 

Word of The Day CONTRIBUTOR
NASA Series CONTRIBUTOR

NASA Astronomy Picture of the Day:

If you went outside at the same time every day and took a picture that included the Sun, how would the Sun's position change? A visual answer to that question is an analemma, a composite image taken from the same spot at the same time over the course of a year. The featured analemma was composed from images taken every few days at noon near the village of Callanish in the Outer Hebrides in Scotland, UK. In the foreground are the Callanish Stones, a stone circle built around 2700 BC during humanity's Bronze Age. It is not known if the placement of the Callanish Stones has or had astronomical significance. The ultimate causes for the figure-8 shape of this and all analemmas are the tilt of the Earth axis and the ellipticity of the Earth's orbit around the Sun. At the solstices, the Sun will appear at the top or bottom of an analemma. The featured image was taken near the December solstice and so the Sun appears near the bottom. Equinoxes, however, correspond to analemma middle points -- not the intersection point. In two days there will be an equinox ("equal night"), when day and night are equal over all of planet Earth. Many cultures celebrate a change of season at an equinox. APOD's main NASA site is moving: From apod.nasa.gov to science.nasa.gov/apod

Photo by Giuseppe Petricca

Public Interest Series CONTRIBUTOR

The Week in Review | The Consequential News of the Past Seven days — September 20, 2026

The week was shaped by three increasingly connected pressures: widening instability in the Middle East, a new phase of economic and military pressure surrounding the Russia-Ukraine war, and renewed inflation concerns that pushed major central banks toward tighter monetary policy. At the same time, U.S.-China diplomacy intensified ahead of a meeting between Presidents Donald Trump and Xi Jinping.

TOP STORIES

Middle East conflict threatens energy and shipping
Houthi attacks on Saudi Arabia intensified during the week, while damage to Saudi energy infrastructure and continuing uncertainty around the Strait of Hormuz kept two strategically important shipping corridors—the Persian Gulf and Red Sea approaches—under pressure. Saudi Arabia sought international help in restraining the Houthis, while Turkey said it could assist Saudi military needs under a trilateral defense arrangement with Pakistan.
Oil remained above $100 a barrel for much of the week. Saudi efforts to redirect additional crude through Oman provided some relief, but the continuing regional conflict left energy markets vulnerable to further disruption.

Federal Reserve raises interest rates
The Federal Reserve raised its benchmark rate by a quarter percentage point to 3.75%–4.00%, its first increase in three years. Policymakers cited persistent inflation, including pressures associated with tariffs, higher energy costs and strong domestic demand, and most indicated that another increase could be needed before year-end.
The decision pushed Treasury yields higher and strengthened the dollar. It also underscored an increasingly difficult economic problem: geopolitical disruption is helping sustain inflation at the same time that higher interest rates are raising borrowing costs for households, businesses and governments.

Pressure on Russia intensifies as long-range attacks escalate
President Trump signed sweeping new sanctions targeting Russia's energy and defense industries and its network of tankers used to circumvent existing restrictions. The legislation also provides for tariffs affecting major countries that continue substantial trade with Russia.
Meanwhile, Russia and Ukraine continued exchanging long-range attacks. On September 20, Ukraine carried out what Russian authorities described as the largest drone attack yet on the Moscow region, striking an oil refinery and other targets. Russia continued missile and drone attacks against Ukrainian cities and infrastructure.

UNITED STATES
Economic policy moved to the foreground after the Federal Reserve's rate increase. The decision represented a significant reversal from expectations earlier in the year that borrowing costs would decline. Fed officials now see inflation returning to their 2% target more slowly than previously projected.
Foreign policy also produced an important shift toward Russia. The sanctions legislation signed Friday expands Washington's ability to target Russian energy revenues while potentially placing economic pressure on countries purchasing Russian oil.
Attention increasingly turned toward U.S.-China relations. Treasury Secretary Scott Bessent and Chinese Vice Premier He Lifeng began discussions in New York covering trade, artificial intelligence and critical minerals ahead of Xi Jinping's planned Washington visit. Negotiators were also discussing possible reductions in Chinese tariffs on U.S. liquefied natural gas.

MIDDLE EAST
The regional conflict continued moving beyond Iran itself. Houthi missile and drone attacks reached Saudi targets, including areas near Riyadh, while damage to Saudi oil infrastructure complicated efforts to move crude around the disrupted Strait of Hormuz. Gulf financial markets weakened as investors assessed the possibility of a more prolonged confrontation.
Diplomatic efforts continued but produced no decisive breakthrough. China faced calls to use its relationship with Iran to restrain the Houthis, while Turkey signaled greater willingness to assist Saudi Arabia. The result is an increasingly complicated regional alignment in which military, diplomatic and energy interests overlap.

RUSSIA AND UKRAINE
The war entered another period of intensified long-range attacks. Russia struck Ukrainian cities and infrastructure during the week, while Ukraine expanded attacks against Russian energy and logistical targets. The September 20 assault brought the war directly to the Moscow region on an unprecedented scale.
Russia also concluded its first wartime parliamentary election. Voting included Russian-occupied Ukrainian territories, drawing international objections, while the political environment inside Russia remained tightly controlled.

CHINA AND ASIA-PACIFIC
U.S.-China negotiations gained importance ahead of the Trump-Xi meeting. Trade and tariffs remain central, but the agenda has broadened to include artificial intelligence, rare-earth minerals, energy and other strategic technologies.
China also announced a significant advance in domestic semiconductor manufacturing: memory-chip producer CXMT said a new generation of DRAM technology had entered mass production, another step in Beijing's effort to reduce dependence on foreign semiconductor technology.
Elsewhere in Asia, North Korea launched two short-range ballistic missiles on September 20, again highlighting the continuing absence of meaningful progress toward renewed nuclear negotiations.

CANADA AND EUROPE
Canada continued efforts to diversify its economic relationships amid trade friction with the United States. Prime Minister Mark Carney courted international investment and strengthened contacts with European leaders, including French President Emmanuel Macron.
European governments remained heavily focused on Ukraine, Russian sanctions and protection of critical infrastructure as concern persisted about cyberattacks, sabotage and other forms of pressure associated with the wider confrontation with Moscow.

AFRICA
Sudan's humanitarian emergency remained among the world's most severe but least adequately funded crises. Nearly 20 million people are facing hunger, while the World Food Programme reported that its funding for Sudan has fallen dramatically even as displacement and humanitarian needs remain enormous.

ECONOMY & MARKETS
The combination of high energy prices and rising interest rates became one of the week's central economic themes.
The Federal Reserve's rate increase was followed by tighter monetary policy elsewhere, including a Bank of Japan rate increase. China, by contrast, kept its principal lending rates unchanged, reflecting both domestic economic weakness and limited room for additional monetary easing while U.S. rates are rising.
Markets reacted accordingly. Government bond yields rose, the dollar strengthened and equities became more volatile. Oil prices fluctuated with developments in the Middle East but remained historically high enough to reinforce inflation concerns.

TECHNOLOGY & ARTIFICIAL INTELLIGENCE
Artificial intelligence increasingly became a matter of economic policy and national security rather than simply technological development.
Global technology shares fell sharply early in the week after prominent AI industry leaders called for slowing the pace of advanced AI development because of safety concerns. President Trump rejected arguments that the United States needed substantially stronger AI restrictions, saying existing legal tools could address abuses.
At the same time, AI emerged directly in U.S.-China economic negotiations. That development illustrates how control of advanced computing technology is becoming intertwined with trade policy, critical minerals, semiconductor production and national security.


THE BIG PICTURE - Connecting Current Events | September 20, 2026

The week's most consequential developments appear at first to belong to different subjects: war in the Middle East, interest rates in Washington, sanctions against Russia, negotiations with China and rapidly advancing artificial intelligence.
Increasingly, they are parts of the same story.
For much of the period after the Cold War, globalization rested on an assumption that economic relationships could continue expanding even when governments disagreed politically. Energy, technology, trade and finance were deeply interconnected, but they were often treated as separate from military security. That distinction is becoming harder to maintain.
The Middle East provides the clearest example. Conflict affecting the Strait of Hormuz and Red Sea shipping routes is simultaneously a military crisis and an economic one. Disruption of oil supplies raises transportation and manufacturing costs far beyond the region. Those higher costs contribute to inflation. Inflation then influences decisions by the Federal Reserve and other central banks. Higher interest rates affect mortgages, business investment, government borrowing and household finances.

A regional conflict can therefore reach an American household without ever reaching American territory.


The Russia-Ukraine war demonstrates the same connection from another direction. Military operations increasingly target energy infrastructure because energy is both an economic resource and a source of strategic power. Washington's new sanctions legislation similarly attempts to influence the battlefield indirectly by reducing the revenues available to Moscow.

Economic policy has become an instrument of national security.


The approaching Trump-Xi meeting shows the pattern even more clearly. The agenda includes tariffs, liquefied natural gas, rare-earth minerals, semiconductors and artificial intelligence. Each is simultaneously commercial and strategic.
Rare-earth minerals are needed for advanced technologies. Semiconductors are essential to both consumer products and military systems. Artificial intelligence may shape economic productivity as well as defense capabilities. Energy remains fundamental to industrial power.
The result is not the disappearance of globalization. Countries remain far too economically connected for that. Instead, globalization is becoming more explicitly strategic.

China wants greater technological independence while continuing to sell products throughout the world. The United States wants to restrict Chinese access to certain advanced technologies while maintaining enormous commercial ties with China. India participates in BRICS while maintaining important relationships with Western countries. Canada is looking toward Europe and other markets while remaining deeply integrated economically with the United States.

Even adversaries remain dependent upon one another. That creates a paradox likely to define the coming years: the world is becoming more strategically competitive while remaining deeply economically interconnected.
This helps explain why governments increasingly talk about resilience, supply chains, domestic manufacturing, energy security and critical minerals. They are trying to reduce vulnerabilities without abandoning the economic benefits of international trade.

Artificial intelligence may accelerate the trend. AI requires enormous quantities of computing power, electricity, sophisticated semiconductors and investment capital. Leadership in AI therefore depends upon many of the same resources already at the center of international competition.
The important connection this week is consequently broader than any individual headline. Energy policy is becoming security policy. Technology policy is becoming trade policy. Trade policy is becoming foreign policy. And monetary policy increasingly must respond to all of them.

The world remains interconnected—but the character of that interconnection is changing.

© 2026–Present Kudos 365. All Rights Reserved.

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