Hence this specification requires that years must be comprised of four digits in all cases. Watered down some of the hyperbole around the value of providing timezone information. Not available online. A method of defining time absolutely. The following sections present the acceptable formats for date and times, with accompanying notes and examples.
Square brackets enclose an optional portion of the format.
All other characters should be assumed to be literal characters. All components must be zero padded to two digits. The only punctuation character that is acceptable between date components is the hyphen character u002d. This specification does not wholly specify how many digits may be used to represent the decimal fraction of a second, but does require that a minimum of 4 digits be supported. Unfortunately even if it does contravene the specification it has been deemed a requirement that we allow you to omit the timezone information.