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 JDMonthName    (PHP 3, PHP 4 , PHP 5) JDMonthName -- Returns a month nameDescriptionstring jdmonthname  ( int julianday, int mode) 
     Returns a string containing a month name.
     mode tells this function which calendar to
     convert the Julian Day Count to, and what type of month names are
     to be returned.
      表格 1. Calendar modes | Mode | Meaning | Values | 
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 | 0 | Gregorian - abbreviated | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |  | 1 | Gregorian | January, February, March, April, May, June, July, August, September, October, November, December |  | 2 | Julian - abbreviated | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |  | 3 | Julian | January, February, March, April, May, June, July, August, September, October, November, December |  | 4 | Jewish | Tishri, Heshvan, Kislev, Tevet, Shevat, AdarI, AdarII, Nisan, Iyyar, Sivan, Tammuz, Av, Elul |  | 5 | French Republican | Vendemiaire, Brumaire, Frimaire, Nivose, Pluviose, Ventose, Germinal, Floreal, Prairial, Messidor, Thermidor, Fructidor, Extra | 
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