ISO 8601 is the international standard for the representation of dates and times.
The ISO 8601 syntax (YYYY-MM-DD) is also the preferred JavaScript date format:
Example (Complete date)
The computed date will be relative to your time zone.
Depending on your time zone, the result above will vary between March 24 and March 25.
ISO Dates (Year and Month)
ISO dates can be written without specifying the day (YYYY-MM):
Example
Time zones will vary the result above between February 28 and March 01.
ISO Dates (Only Year)
ISO dates can be written without month and day (YYYY):
Example
Time zones will vary the result above between December 31 2014 and January 01 2015.
ISO Dates (Date-Time)
ISO dates can be written with added hours, minutes, and seconds (YYYY-MM-DDTHH:MM:SSZ):
Example
Date and time is separated with a capital T.
UTC time is defined with a capital letter Z.
If you want to modify the time relative to UTC, remove the Z and add +HH:MM or -HH:MM instead:
Example
UTC (Universal Time Coordinated) is the same as GMT (Greenwich Mean Time).
Omitting T or Z in a date-time string can give different results in different browsers.
Time Zones
When setting a date, without specifying the time zone, JavaScript will use the browser's time zone.
When getting a date, without specifying the time zone, the result is converted to the browser's time zone.
In other words: If a date/time is created in GMT (Greenwich Mean Time), the date/time will be converted to CDT (Central US Daylight Time) if a user browses from central US.
JavaScript Short Dates.
Short dates are written with an "MM/DD/YYYY" syntax like this:
Example
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