SETDATE JAVASCRIPT ISO
This is due to a historical spec error that was not consistent with ISO 8601 but could not be changed due to web compatibility. When the time zone offset is absent, date-only forms are interpreted as a UTC time and date-time forms are interpreted as local time. Each combination can be followed by a time zone offset.įor example, "" ( date-only form), "T14:48:00" ( date-time form), or "T14:48:00.000+09:00" ( date-time form with milliseconds and time zone) are all valid date time strings. Date-time form: one of the above date-only forms, followed by T, followed by HH:mm, HH:mm:ss, or HH:mm:ss.sss.Date-only form: YYYY, YYYY-MM, YYYY-MM-DD.Various components can be omitted, so the following are all valid: Z is the timezone offset, which can either be the literal character Z (indicating UTC), or + or - followed by HH:mm, the offset in hours and minutes from UTC.sss is the millisecond, with three digits ( 000 to 999).ss is the second, with two digits ( 00 to 59).mm is the minute, with two digits ( 00 to 59).As a special case, 24:00:00 is allowed, and is interpreted as midnight at the beginning of the next day. HH is the hour, with two digits ( 00 to 23).The T is required when specifying the time part. T is a literal character, which indicates the beginning of the time part of the string.DD is the day of the month, with two digits ( 01 to 31).MM is the month, with two digits ( 01 to 12).000000 is explicitly disallowed as a valid year. YYYY is the year, with four digits ( 0000 to 9999), or as an expanded year of + or - followed by six digits.The format is as follows: YYYY-MM-DDTHH:mm:ss.sssZ The JavaScript specification only specifies one format to be universally supported: the date time string format, a simplification of the ISO 8601 calendar date extended format. There are many ways to format a date as a string. Date.UTC() works similarly, but it interprets the components as UTC time and also accepts a single argument representing the year. The Date() constructor can be called with two or more arguments, in which case they are interpreted as the year, month, day, hour, minute, second, and millisecond, respectively, in local time. There are two groups of Date methods: one group gets and sets various date components by interpreting the timestamp as a local time, while the other uses UTC. In essence, the timezone offset is the offset from UTC time, at the time represented by the Date object and at the location of the host environment. Note that the timezone offset does not only depend on the current timezone, but also on the time represented by the Date object, because of daylight saving time and historical changes. The getTimezoneOffset() method returns the difference between UTC and the local time in minutes. As a local time in New York (UTC-5), it is 19:00:00 on December 31, 1969.As a UTC time, it is midnight at the beginning of January 1, 1970, UTC,.
Note: UTC should not be confused with the Greenwich Mean Time (GMT), because they are not always equal - this is explained in more detail in the linked Wikipedia page.įor example, the timestamp 0 represents a unique instant in history, but it can be interpreted in two ways:
0 kommentar(er)
