Everybody knows that there are 24 hours in a day, 60 minutes in an hour, and 60 seconds in minute. But in 1793, the French smashed the old clock system in favor of French Revolutionary Time, which was a 10-hour day, with 100 minutes per hour, and 100 seconds per minute. This thoroughly modern system had a few practical benefits, chief among them being a simplified way to do time-related math. If we want to know when a day ... continue reading >>>
The 24 hour watch is the most common way of telling time in the world. 24 hour time is mainly used in Asia, Africa, Europe, and the Latin American countries. It’s the most preferred way of communicating time to other people all around the globe. It doesn’t use “a.m” or “p.m”. In the US and some of the English-speaking countries in Canada, the 24 hour watch system is referred to as military time. In the United Kingdom, this system is at times referred to as continental time. In other parts of the globe, it’s referred to as railway time. The international standard time notation (that is, ISO 8601) ... continue reading >>>
Modern 24 hour analog clocks and watches, and many digital clocks and watches, use the 24 hour time system, in which the 24 hours of the day are numbered from 1 to 24, or 0 through 23. The first 12 hours of the day are numbered from 1 to 12, but 1 in the afternoon is numbered 13, 2 is numbered 14, and so on, until 11 at night, which is numbered 23. The 24 hour time system is also widely available as an option for digital clocks or watches. If they can’t manage the 24 hour time system, they’ll need some kind of AM/PM indication. Digital clocks don’t appear much on this site, since ... continue reading >>>
The beginning of 24-hour time periods is rooted in Early Egyptian Culture . Other time keeping systems were in use prior to this period, and continued to be used in the rest of the world for a considerable amount of time after the end of the old Egyptian civilization. However, it was the Egyptians who were the first to use the 24 hour clock. Their system evolved around the time it took certain constellations to pass through the sky, eventually giving rise to a 360 day year. However, in the early days the 24-hour clock made use of what are called temporal hours. Temporal hours reflect the differing ... continue reading >>>
You have likely heard A.M. or P.M. (also seen as AM and PM, a.m and p.m., or am and pm) used to reference the timekeeping in several situations without ever giving much thought to why and where this time keeping system originated. The short answer is A.M. stands for “ante meridiem”, which is Latin and depicts the time of day “before noon.” P.M. stands for “post meridiem”, which is Latin and references the time “after noon.” There are two primary timekeeping systems used today in the world. The first and most popular is the 24 hour clock for which military time is based on. The second ... continue reading >>>
A time zone is a region that observes a uniform standard time for legal, commercial, and social purposes. Time zones tend to follow the boundaries of countries and their subdivisions because it is convenient for areas in close commercial or other communication to keep the same time. Most of the time zones on land are offset from Coordinated Universal Time (UTC) by a whole number of hours (UTC−12 to UTC+14), but some governments make local time zones decisions that deviate from the norm. Note that India is +5½ from UTC, while Myanmar (Burma) is +6½, Iran is +4½, Iraq is +3½ ... continue reading >>>
Having not served in the Armed Forces, I was always thrown for a loop whenever someone would randomly bust out military time. I didn’t have problems with morning times — those are easy to figure out. 0800. Yeah, I got it. 8:00am. It was when someone gave me a time that was in the afternoon or evening that I had trouble. I knew I had to add or subtract 12 to convert military time to standard time, I just never knew which one was the correct option in that moment. Consequently, I would stand there in silence, furrowing my eyebrows, trying to make the conversion as quickly as I ... continue reading >>>
In the civilian world, the commonly used time system is the 12-hour system where the same notation of time appears twice a day. As a result, the two similar notations must be differentiated with another notation which is AM and PM. This makes it easy to confuse time frames. In the military world, a slight confusion of time interpretation can be fatal. Therefore, the military had to improvise a time system which reduces any chances of ambiguity. This brought the adoption of the military system also known as the 24-hour clock system. The system is also popular in firms and institutions where ... continue reading >>>
The United States Military, Chinese Military, and many others across the globe use military time zones help with planning. It is used to ensure standardization and effective communication across many different time zones. The names are based on the NATO phonetic alphabet. The system was originally based on the works within the American Practical Navigator published in 1802 by Nathaniel Bowditch. The letter J, otherwise known as Juliet, was originally not included. Now it used to identify the observer’s local time. The letter Z, otherwise known as Zulu, is used to describe the Greenwich Mean ... continue reading >>>
For many people sorting out midnight military time can be a head scratcher. Terms like noon and midnight are generally used as part of the AM/PM time keeping system. When it comes to midnight, it is notated and referred to in a different way. So what is midnight military time? Should 12AM be notated as 2400 or 0000 military time? Below you will find an explanation and examples on how midnight military time works. Military time is a unique timekeeping system that is based on the 24 hour clock as standardized by ISO 8601. This standard notates midnight as both 0000 and 2400 but ... continue reading >>>
Since the 1920s a nautical standard time system has been in operation for ships on the high seas. Nautical time zones are an ideal form of the terrestrial time zone system. Under the system, a time change of one hour is required for each change of longitude by 15°. The 15° gore that is offset from GMT or UT1 (not UTC) by twelve hours is bisected by the nautical date line into two 7.5° gores that differ from GMT by ±12 hours. A nautical date line is implied but not explicitly drawn on time zone maps. It follows the 180th meridian except where it is interrupted by territorial waters adjacent to land ... continue reading >>>
The sun was important for the norse people in many ways. Not only for their crops to grow during the short summertime, but also as an important navigation aid on their long sea journeys. The seafarers made many sun observations throughout the year, and they knew and wrote down the sun's path across the sky in the different seasons. Using these tables they had no difficulty finding the four directions of the sky or determining the latitude ... continue reading >>>
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