Years less than 100 that is used in SimpleDateFormat. That this is slightly different from the interpretation of Years from 0 to 18 are assumed to mean 2000 to 2018. The range 19 to 99 are assumed to mean 1919 to 1999, while For example, if the current year is 1999 then years in The time when the Date class is initialized.Īfter adjusting the year number, 1900 is subtracted from Which dates are within 80 years before and 19 years after Interpreted as an abbreviated year relative to a century of If the recognized year number is less than 100, it is The number is less than 70, and both a month and a day of.The number is equal to or greater than 70 and followed by a.The number is regarded as a year number if one of the.Redundantly-for example, GMT-5 or utc+0430. Thirty minutes east of Greenwich.' It is permitted for the Of Greenwich' and +0430 would mean 'four hours and 5 occurring in the string would mean 'five hours west Time zone offsetsĪre always relative to UTC (Greenwich). Otherwise, it is regarded as an offset in minutes,Įxpressed in 24-hour time format without punctuation. If the number is less than 24, it is an offset measured Has already been recognized, then the number is a time-zone If a number is preceded by + or - and a year.

Otherwise, the only characters permittedĪ consecutive sequence of decimal digits is treated as a decimal Any material in s that is within theĪSCII parenthesis characters ( and ) is ignored. The string s is processed from left to right, looking forĭata of interest. If no time zone is specified, the local time zone isĪssumed. General use, a time-zone offset should be used: 'Sat, ġ3:30:00 GMT+0430' (4 hours, 30 minutes west of the Greenwich Standard date syntax: 'Sat, 13:30:00 GMT'. It accepts many syntaxes in particular, it recognizes the IETF Milliseconds, of that time from the epoch (00:00:00 GMT on Indicated is returned represented as the distance, measured in Since: JDK1.0 See Also: DateFormat,Īttempts to interpret the string s as a representation Specified as January 32 and is interpreted as meaning February 1. Not fall within the indicated ranges for example, a date may be In all cases, arguments given to methods for these purposes need Minute, but this specification follows the date and time conventions Of the manner in which leap seconds are currently introduced, it isĮxtremely unlikely that two leap seconds will occur in the same Implementations that actually track leap seconds correctly. A second is represented by an integer from 0 to 61 the values 60 andĦ1 occur only for leap seconds and even then only in Java.A minute is represented by an integer from 0 to 59 in the usual manner.An hour is represented by an integer from 0 to 23.A date (day of month) is represented by an integer from 1 to 31.A month is represented by an integer from 0 to 11 0 is January,ġ is February, and so forth thus 11 is December.Year, month, date, hours, minutes, and seconds values, the In all methods of class Date that accept or return Naval Observatory, particularlyĪnd their definitions of 'Systems of Time' at: An interesting source ofįurther information is the U.S. Global positioning system (GPS) is synchronized to UTC but is Well for example, the time scale used by the satellite-based Seconds are introduced as needed into UTC so as to keep UTC withinĠ.9 seconds of UT1, which is a version of UT with certainĬorrections applied. In complicated ways), UT does not always flow uniformly. Because theĮarth's rotation is not uniform (it slows down and speeds up Practical purposes is an invisibly fine hair to split. Theĭistinction between UTC and UT is that UTC is based on an atomicĬlock and UT is based on astronomical observations, which for all The 'civil' name for the standard UT is the Time (GMT), which is equivalent to universal time (UT).

Some computer standards are defined in terms of Greenwich mean Most computer clocks are not accurate enough to be able to reflect Year 1995 was 61 seconds long, thanks to an added leap second.

Second is always added as the last second of the day, and always Is an extra second, called a 'leap second.' The leap In UTC, however, about once every year or two there Nearly all modern operating systems assume that 1 day = The corresponding methods in Date are deprecated.Īlthough the Date class is intended to reflectĬoordinated universal time (UTC), it may not do so exactly,ĭepending on the host environment of the Java Virtual Machine.

As of JDK 1.1, theĬalendar class should be used to convert between dates and timeįields and the DateFormat class should be used to format and Unfortunately, the API for these functions was notĪmenable to internationalization. It also allowed the formatting and parsing It allowed the interpretation of dates as year, month, day, hour, Prior to JDK 1.1, the class Date had two additionalįunctions. The class Date represents a specific instant

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