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 …

Nov 4, 2025 · 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).

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 …

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.

This can add a bit of confusion as the term Pacific Time does not differentiate between standard time and Daylight Saving Time, so Pacific Time switches between PDT and PST in areas that …

This can add a bit of confusion as the term Eastern Time does not differentiate between standard time and Daylight Saving Time, so Eastern Time switches between EST and EDT in areas that …

This can add a bit of confusion as the term Eastern Time does not differentiate between standard time and Daylight Saving Time, so Eastern Time switches between EST and EDT in areas that …

What Does MT Time Zone Mean? Unlike other time zone denominations, which have a fixed time, Mountain Time refers to a geographical area where the time changes twice yearly as Daylight …

What Does PT Time Zone Mean? Unlike other time zone denominations, which have a fixed time, Pacific Time refers to a geographical area where the time changes twice yearly as Daylight …

Information about the time zone abbreviation GMT – Greenwich Mean Time - where it is observed and when it is observed