On the other hand, the 24-hour clock uses a unique number for each hour of the day, starting at 12:00 AM or midnight. Post meridiem (after noon) - PM or p.m.Ante meridiem (before noon) - AM or a.m.These abbreviations come from Latin terms: We see here that the US standard time uses the abbreviations “a.m.” and “PM” to signify time before noon and time after noon, respectively. 3:30 PM - Half past three in the afternoon.
So, here are a couple of examples to illustrate the standard format used in the US to show time:
This clock splits the day into two blocks of time: The standard US timekeeping method uses the 12-hour clock. USA Timekeeping Law How is military time different from standard US time? The use of the 24-hour clock format is also encouraged by ISO 8601 international standards - established with the intention to provide clear and specific ways to communicate date and time. This timekeeping standard is widely used around the world, except in the US and several other countries, such as the following: Military time is a US term used to describe a timekeeping method otherwise known as the 24-hour clock.
