Wolfram言語

単位と日付

豊富な日付形式

標準的な日付形式のDateStringオブジェクトを取得する.

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DateString[]
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ISO-8601日付時刻形式を使って日付を得る.

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DateString["ISODateTime"]
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ISO-8601の序数日付形式として日付文字列を解釈する.

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DateObject[{"2012-184", {"ISOOrdinalDate"}}]
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ISO-8601週日付形式でDateObject式を得る.

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DateObject[DateFormat -> "ISOWeekDate"]
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カスタムの日付形式の日付オブジェクトを作る.

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DateObject[{2014, 8, 4}, DateFormat -> {"DayName", " ", "MonthName", " ", "Day", ", ", "YearRomanNumeral"}]
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何十という日付形式要素が使用できる.

完全なWolfram言語入力を表示する
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flist = {"Date", "DateShort", "Time", "DateTime", "DateTimeShort", "ISODate", "ISOWeekDate", "ISOOrdinalDate", "ISODateTime", "ADBC", "CEBCE", "Year", "YearShort", "ISOYear", "YearRomanNumeral", "YearUnsigned", "QuarterName", "QuarterNameShort", "Quarter", "MonthName", "MonthNameShort", "MonthNameInitial", "Month", "MonthShort", "MonthRomanNumeral", "MonthRomanNumeralLowerCase", "Week", "WeekShort", "DayName", "DayNameShort", "DayNameInitial", "ISOWeekDay", "Day", "DayShort", "ISOYearDay", "ISOYearDayShort", "Hour", "Hour12", "Hour24", "HourShort", "Hour12Short", "Hour24Short", "AMPM", "AMPMLowerCase", "TimeZoneGMTRelative", "ISOTimeZOne", "TimeZoneName", "TimeZoneNameShort", "Minute", "MinuteShort", "Second", "SecondShort", "SecondExact", "Millisecond", "MillisecondShort"}; Rasterize[ Grid[Map[Pane[ Style[# /. Last[flist] -> "Custom", ScriptLevel -> 0], {300}] &, Join[{{"Date String Format", DateObject[{2016, 2, 9}]}}, Transpose[{flist, Map[DateString[{2016, 2, 9, 14, 8, 4.2301}, #] &, flist]}]], {2}], Dividers -> All, Spacings -> {2, 2}, Background -> {None, {{None, GrayLevel[.9]}}, {{1, 1} -> Hue[.6, .4, 1], {1, 2} -> Hue[.6, .4, 1]}}, BaseStyle -> {FontFamily -> Times, FontSize -> 13}] // TraditionalForm, ImageResolution -> 144, RasterSize -> 600, ImageSize -> 300]
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