What Z means in date?
David Mccullough
Published Jan 16, 2026
ISO 8601
As of ISO 8601-1:2019, the basic format is T[hh][mm][ss] and the extended format is T[hh]:[mm]:[ss]. Earlier versions omitted the T (representing time) in both formats. [hh] refers to a zero-padded hour between 00 and 23. [mm] refers to a zero-padded minute between 00 and 59.
› wiki › ISO_8601
offset-from-UTC
The UTC offset (or time offset) is an amount of time subtracted from or added to Coordinated Universal Time (UTC) time to specify the local solar time (which may not be the current civil time, whether it is standard time or daylight saving time).
› wiki › UTC_offset
What does Z mean at end of date?
The literal "Z" is actually part of the ISO 8601 datetime standard for UTC times. When "Z" (Zulu) is tacked on the end of a time, it indicates that that time is UTC, so really the literal Z is part of the time.What does Z mean time?
All aspects of meteorology are based upon a world-wide 24-hour clock called Zulu time (Z), more commonly called Coordinated Universal Time (UTC). You will notice all weather maps, radar, and satellite images all have their time expressed in "Z".What does Z mean in date string?
The T separates the date portion from the time-of-day portion. The Z on the end means UTC (that is, an offset-from-UTC of zero hours-minutes-seconds). The Z is pronounced “Zulu”.What is Z timestamp?
The Z stands for the Zero timezone, as it is offset by 0 from the Coordinated Universal Time (UTC). Both characters are just static letters in the format, which is why they are not documented by the datetime.What the ‘Z’ Logo on Russian Tanks Means
What is Z in the end of Localdatetime?
The Z on the end means UTC, and is pronounced “Zulu”.What is UTC date/time format?
The UTC Time FormatFor instance, UTC time in ISO-8601 is xx:xx:xxZ. The Z letter is added without a space. Another UTC format is a 12-hour clock time (AM/PM) xx:xx:xx. Time can be confusing sometimes, but telling time becomes a piece of cake if you understand it you have the right tools.