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Why did a leap second break the internet?

Mark Sterling
Mark Sterling
Research Editor · Jan 25, 2026 · Updated Apr 13, 2026

The leap second itself didn't do anything. It's that some computers had the leap second implemented while others hadn't, so the time stamps in the packages made the one computer think "wow, these packets are really old" and so it sped them up, and started transmitting faster, but then those other…

94
Words

1 min
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#156
of 500 in Technology

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The Short Answer

The leap second itself didn't do anything. It's that some computers had the leap second implemented while others hadn't, so the time stamps in the packages made the one computer think "wow, these packets are really old" and so it sped them up, and started transmitting faster, but then those other systems were like "shit, those packages are from the future" and lost their shit and decided to block the one thing until those packets became back into the present, so the whole thing spun around itself and made some sort of time loop.

Analysis

Key Concepts: Leap, second, itself

This explanation focuses on leap, second, itself and spans 94 words across 2 sentences. At 25% above the average Technology explanation (75 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.

What This Answer Covers

This is a focused, single-point answer that gets directly to the core of the question without detours.

How This Compares in Technology

Ranked #156 of 500 Technology questions by answer depth (top 32%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why a leap second break the internet?

The leap second itself didn't do anything. It's that some computers had the leap second implemented while others hadn't, so the time stamps in the packages made the one computer think "wow, these packets are really old" and so it sped them up, and…

How detailed is this explanation compared to similar Technology questions?

This is an above-average answer at 94 words, ranked #156 of 500 Technology questions by depth. The key concepts covered are leap, second, itself.

What approach does this answer take to explain a leap second break the internet?

The explanation uses contrasting perspectives across 94 words. It is categorized under Technology and addresses the question through 1 analytical lens.