(PHP 4, PHP 5, PHP 7)
jdmonthname — Returns a month name
$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.
   
| Mode | Meaning | Values | 
|---|---|---|
| 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 | 
jdayThe Julian Day to operate on
calendarThe calendar to take the month name from
   The month name for the given Julian Day and calendar.