AM and PM Explained
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?
Elsewhere on timeanddate.com
New Year's Day
Russians celebrate New Year’s Day in accordance with the Gregorian calendar on January 1.
Orthodox Christmas Day
Many Russians celebrate Christmas Day on January 7 in the Gregorian calendar, which corresponds to December 25 in the Julian calendar.
Daylight Saving Time (DST)
Why do many countries set the clocks back and forth an hour twice a year?