Why does the US have daylight saving time?

Only Arizona and Hawaii are exempt from changing the time twice a year to account for daylight saving time.

Fall back: How daylight saving time can seriously affect your health – WANE 15

Map: The states in favor of yearlong daylight saving time

Here's How Daylight Saving Time Affects Your Part of the Country

How permanent daylight saving time would change sunrise and sunset times - The Washington Post

What is the history of daylight saving time?

Explainer-What Is US Daylight Saving Time and Why Was It Created?

The Tumultuous History of Daylight Saving Time

FAQs: How Does Daylight Savings work? Do We Gain or Lose and Hour?

Visualizing the Impact of Permanent Daylight Savings Time on Winter Sunrise and Sunset Times // Conor McLaughlin

Daylight savings time 2023: Time change in November information

Daylight savings time 2023: When does time change? Do we lose an hour?

What would permanent daylight saving time look like for Colorado?

Daylight Saving Time: Daylight Saving Time: Why did two US states not change the time? Here's what you may need to know - The Economic Times

History of Daylight Savings Time Bureau of Transportation Statistics