AM and PM Explained
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?
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Daylight Saving Time (DST)
Why do many countries set the clocks back and forth an hour twice a year?
12 Months of the Year
The 12 months of the year are linked to the Moon's orbit around Earth. Why are there 12 months? What do the month names mean?
UTC – Coordinated Universal Time
Coordinated Universal Time (UTC) is the basis for civil time today. This 24-hour time standard is kept using highly precise atomic clocks combined with the Earth's rotation.
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