In a 24-hour day, a.m. and p.m. refer to the two 12-hour periods of the day. A.m. refers to the period between 12:00 in the morning and 11:59 in the late morning, whereas p.m. refers to the period between 12:00 midday and 11:59 in the late evening.Know More
The abbreviation a.m. is derived from the Latin phrase ante meridiem, which translates to "before midday." The abbreviation p.m., also derived from Latin, stands for post meridiem, which translates to "after midday."
The time designations a.m. and p.m. are used when referring to 12-hour clocks. The 24-hour clock, which is used in the military, eliminates a.m. and p.m., instead using the numbers 0000 through 2400 to refer to hours and minutes, with the first two numbers representing hours and the last two numbers representing minutes.
The terms coordinate with the rising, setting and midday position of the sun. Before precise timekeeping came into use, people could tell the time of day based on the sun's position. For example, when the sun crosses the meridian in a specific geographic location, it is noon, otherwise known as midday, signifying the end of the a.m. period and the beginning of the p.m. period. People residing in the same time zone experience noon at the same time, but as they move through time zones, the time differs in one-hour increments.Learn More
In military time, 10 p.m. is known as 2200 hours. Military time involves a 24-hour clock instead of the civilian 12-hour clock. Times are reported using four numerals, the first two of which refer to the hour and the second two to the minutes.Full Answer >
To convert 7 p.m. Greenwich Mean Time to Eastern Standard Time, subtract five hours from 7 p.m. The result shows that when it is 7 p.m. GMT, it is 2 p.m. EST. Keep in mind that in countries where Daylight Standard Time is used during the summer months, the difference is only four hours while DST is in effect.Full Answer >
The time 4 p.m. in the Eastern Standard Time zone is 9 p.m. in the Greenwich Mean Time zone. During daylight savings time, the GMT time is 8 p.m. when the Eastern Daylight Time is 4 p.m.Full Answer >
Christmas Day fell on a Wednesday in 2013. The Christmas holiday is always celebrated on the 25th of December, and Christmas Eve falls on December 24th.Full Answer >