Christmas Day
Christmas Day is one of the biggest Christian celebrations and falls on December 25 in the Gregorian calendar.
Elsewhere on timeanddate.com
Republic Day/New Year's Day
New Year’s Day is the first day of the year, or January 1, in the Gregorian calendar.
AM and PM Explained
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?
Daylight Saving Time (DST)
Why do many countries set the clocks back and forth an hour twice a year?