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    jdmonthname

    (PHP 4, PHP 5, PHP 7, PHP 8)

    jdmonthname — 月の名前を返す

    説明

    jdmonthname(int $julian_day, int $mode): string

    月の名前を含んだ文字列を返します。 modeはユリウス積算日をどの暦に変換するか、 どんなタイプの月名を返すかを関数に伝えます。

    暦モード
    モード 意味 値
    CAL_MONTH_GREGORIAN_SHORT グレゴリウス暦 - 省略形 Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
    CAL_MONTH_GREGORIAN_LONG グレゴリウス暦 January, February, March, April, May, June, July, August, September, October, November, December
    CAL_MONTH_JULIAN_SHORT ユリウス暦 - 省略形 Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
    CAL_MONTH_JULIAN_LONG ユリウス暦 January, February, March, April, May, June, July, August, September, October, November, December
    CAL_MONTH_JEWISH ユダヤ暦 Tishri, Heshvan, Kislev, Tevet, Shevat, Adar, Adar I, Adar II, Nisan, Iyyar, Sivan, Tammuz, Av, Elul
    CAL_MONTH_FRENCH フランス革命暦 Vendemiaire, Brumaire, Frimaire, Nivose, Pluviose, Ventose, Germinal, Floreal, Prairial, Messidor, Thermidor, Fructidor, Extra

    パラメータ

    jday

    変換したいユリウス積算日。

    mode

    カレンダーのモード(上の表を参照)

    戻り値

    指定したユリウス積算日と mode にもとづく月名を返します。

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    User Contributed Notes 1 note

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    marc at linkitdesign dot com
    11 years ago
    Regarding the jewish date system. It may be worth noting the following peculiarities, some obvious some not so.
    1. Jewish days start at sunset NOT midnight so when converting from a Gregorian date to a Jewish one it might be worth asking if the date/time occurred 'after sunset'.
    2. Jewish leap years follow a 19 year cycle which can be calculated like this:
    function isJLeapYear($JYear) {
    if ( ((7 * $JYear + 1) % 19) < 7 )
    return true;
    else
    return false;
    }
    3. During a leap year a new leap-month called "Adar I" is inserted BEFORE the normal month of Adar.
    4. During leap years, Adar is renamed "Adar II".
    5. Adar/Adar II has 29 days
    6. Adar I has 30 days
    7. Cheshvan & Kislev have between 29 & 30 Days
    8. Leap years have between 383 and 385 days.
    8. non-leap years have between 353 and 355 days.
    9 . In a 354-day year, months have alternating 30 and 29 day lengths.
    10. In a 353-day year, the month of Kislev is reduced to 29 days.
    11. In a 355-day year, the month of Cheshvan is increased to 30 days.
    12. Leap years years follow the same pattern, with the addition of the 30-day Adar I as well.
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