The Vault is Slate’s history blog. Like us on Facebook, follow us on Twitter @slatevault, and find us on Tumblr. Find out more about what this space is all about here. Between the advent of railway ...

A person may take knowing the local time for granted, but an official review revealed that there is no single, accurate map showing the nation's time zones and local observance of Daylight Saving Time ...

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North Carolina has observed Eastern Standard Time for nearly 80 years. But that didn’t stop the curious from wondering whether the state is one of the few that is in more than one time zone. On ...

If you work with people in distant cities, keeping time zones in sync can be a challenge, as can keeping track of other countries’ holidays. But some versions of Microsoft Outlook can help. I work in ...