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  1. 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 …

  2. UTC Time Standard - timeanddate.com

    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).

  3. UTC: Coordinated Universal Time

    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.

  4. Eastern Standard Time – EST Time Zone

    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 use DST …

  5. Eastern Daylight Time – EDT Time Zone

    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 use DST …

  6. Pacific Time – PT Time Zone

    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 Saving …

  7. Eastern Time – ET Time Zone

    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 …

  8. Pacific Daylight Time – PDT Time Zone

    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 use DST …

  9. India Standard Time – IST Time Zone

    India does not observe Daylight Saving Time (DST), so the offset remains the same year-round. What Is India Standard Time? India Standard Time (IST) is the time zone observed throughout India and Sri …

  10. Mountain Time – MT Time Zone

    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 Saving …