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.
jdmonthname
(PHP 4, PHP 5, PHP 7)
jdmonthname — Returns a month name
Descrierea
jdmonthname
( int
$julian_day
, int $mode
) : string
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 |
|---|---|---|
CAL_MONTH_GREGORIAN_SHORT |
Gregorian - abbreviated | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
CAL_MONTH_GREGORIAN_LONG |
Gregorian | January, February, March, April, May, June, July, August, September, October, November, December |
CAL_MONTH_JULIAN_SHORT |
Julian - abbreviated | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
CAL_MONTH_JULIAN_LONG |
Julian | January, February, March, April, May, June, July, August, September, October, November, December |
CAL_MONTH_JEWISH |
Jewish | Tishri, Heshvan, Kislev, Tevet, Shevat, AdarI, AdarII, Nisan, Iyyar, Sivan, Tammuz, Av, Elul |
CAL_MONTH_FRENCH |
French Republican | Vendemiaire, Brumaire, Frimaire, Nivose, Pluviose, Ventose, Germinal, Floreal, Prairial, Messidor, Thermidor, Fructidor, Extra |
Parametri
-
jday -
The Julian Day to operate on
-
mode -
The calendar mode (see table above).
Valorile întoarse
The month name for the given Julian Day and mode.
add a note
User Contributed Notes 1 note
marc at linkitdesign dot com ¶
11 years ago
