AM and PM: What Do They Mean? - timeanddate. com Ante meridiem is commonly denoted as AM, am, a m , or A M ; post meridiem is usually abbreviated PM, pm, p m , or P M Like many other sources, timeanddate com uses “am” and “pm” when using the 12-hour format, but the other variants are equally correct and widely used
UTC Time Standard - timeanddate. com UTC is a time zone standard used as a basis for all time zones worldwide It is a constant time scale and does not change for Daylight Saving Time (DST)
UTC: Coordinated Universal Time - timeanddate. com While you’re free to state any time around the world using the 12-hour time format with “am” and “pm” labels, UTC always uses the 24-hour clock, also known as military time For example, 7 o’clock in the evening must be written as 19:00 UTC
Central Standard Time (CST) - timeanddate. com This can add a bit of confusion as the term Central Time does not differentiate between standard time and Daylight Saving Time, so Central Time switches between CST and CDT in areas that use DST during part of the year
Eastern Time – ET Time Zone - timeanddate. com What Does ET Time Zone Mean? Unlike other time zone denominations, which have a fixed time, Eastern Time refers to a geographical area where the time changes twice yearly as Daylight Saving Time (DST) begins and ends Eastern Standard Time is UTC-5, while Eastern Daylight Time is UTC-4
How Long Is a Day on Earth? - timeanddate. com AM and PM: What Do They Mean? Military Time ; Atomic Clocks ; Deep Time ; Earth Is a Clock ; Equation of Time ; When Is the Year's Earliest Sunset? Understanding UTC Offsets ; Time Travel