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The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z). Literally speaking the epoch is Unix time 0 (midnight 1/1/1970), but 'epoch' is often used as a synonym for Unix time.
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Sep 22, 2009 · Date date = new Date(); long longValue2 = date.getTime(); LocalDateTime dateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(longValue2), ZoneId.systemDefault()); String formattedString = dateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS")); System.out.println(dateTime.toString()); // 2018-03-06T15:59:30.278 System.out ...
Feb 21, 2017 · Date and time format. Looking for an unambiguous calendar-and-clock format that is internationally understood? It’s time for ISO 8601. This ISO standard helps remove doubts that can result from the various day–date conventions, cultures and time zones that impact a global operation.
ISO 8601 applies to these representations and formats: dates, in the Gregorian calendar (including the proleptic Gregorian calendar); times, based on the 24-hour timekeeping system, with optional UTC offset; time intervals; and combinations thereof. [2]
The ISO 8601 standard is a date and time format used internationally to express a numeric calendar date -- and optionally time. Learn why it's important.
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About ISO 8601 date and time. ISO 8601 is a date and time notation format defined by ISO as an international standard. The date and time are connected by "T" and written. The time zone is expressed as "+09:00" as the difference time from UTC, and in the case of UTC, it is expressed as "Z".
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List of date formats by country. The legal and cultural expectations for date and time representation vary between countries, and it is important to be aware of the forms of all-numeric calendar dates used in a particular country to know what date is intended.
