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📰 Dev.to · HAU

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ISO 8601: The Date Format Standard That Almost Everyone Gets Subtly Wrong

Dev.to · HAU 📣 Digital Marketing & Growth ⚡ AI Lesson 3mo ago

ISO 8601: The Date Format Standard That Almost Everyone Gets Subtly Wrong

ISO 8601 is the international standard for representing dates and times. Every developer has heard of...

How to Calculate Age Correctly: The Edge Cases Every Developer Misses

Dev.to · HAU 🔧 Backend Engineering ⚡ AI Lesson 3mo ago

How to Calculate Age Correctly: The Edge Cases Every Developer Misses

Calculating someone's age sounds like a five-minute task: function getAge(birthday) { const diff...

Timezone Conversion in JavaScript: Why getTimezoneOffset() Will Betray You

Dev.to · HAU ⚡ AI Lesson 3mo ago

Timezone Conversion in JavaScript: Why getTimezoneOffset() Will Betray You

Ask any JavaScript developer how to convert between timezones and someone will say: "use...

The Right Way to Add Months to a Date in JavaScript (It's Not What You Think)

Dev.to · HAU 🔧 Backend Engineering ⚡ AI Lesson 3mo ago

The Right Way to Add Months to a Date in JavaScript (It's Not What You Think)

"What date is 1 month from today?" For March 24, the intuitive answer is April 24. Simple. But what...

JavaScript Countdown Timers: Why setInterval Drifts and How to Fix It

Dev.to · HAU ⚡ AI Lesson 3mo ago

JavaScript Countdown Timers: Why setInterval Drifts and How to Fix It

Building a countdown timer feels like a two-minute task: let seconds = 60; const timer =...

Stop Using new Date('2026-01-01') to Parse Date Strings

Dev.to · HAU ⚡ AI Lesson 3mo ago

Stop Using new Date('2026-01-01') to Parse Date Strings

If you've been writing JavaScript for more than a week, you've probably written something like...

Date Difference Calculations: Why "How Many Days Between" Is Harder Than It Seems

Dev.to · HAU 📊 Data Analytics & Business Intelligence ⚡ AI Lesson 3mo ago

Date Difference Calculations: Why "How Many Days Between" Is Harder Than It Seems

"How many days between January 1 and March 24?" Go ahead, count it in your head. Most people say 82...

Business Days vs Calendar Days: The Date Math Mistake That Breaks Your Deadlines

Dev.to · HAU 3mo ago

Business Days vs Calendar Days: The Date Math Mistake That Breaks Your Deadlines

When a project manager says "deliver in 30 days", do they mean 30 calendar days or 30 working days?...

Stop Writing Structs by Hand: Generate Go, Java, TypeScript, and 8 More from JSON

Dev.to · HAU 3mo ago

Stop Writing Structs by Hand: Generate Go, Java, TypeScript, and 8 More from JSON

Automatic Code Generation from JSON JSON Buddy's Code Generator converts any JSON object...