For the 26th time since 1972, a leap second will be added to the clock to compensate for the Earth’s slowing rotation. But will it be history’s last?
The summer solstice was a day of great significance for many past civilizations.
Explore the history of the Gregorian calendar, which Britain and its colonies adopted 260 years ago.
Archaeologists at Xultún, a Maya site in Guatemala, have discovered walls with paintings and writing, including calculations related to the Maya calendar.
As you prepare to reset your watches, alarms and microwaves, explore eight facts about daylight saving time that might surprise you.
Find out more about the intriguing history of leap year, as well as some fun facts and famous people with leap day birthdays.
Explore the history of Friday the 13th and find out whether this widely reviled day deserves its bad rap.