jddayofweek(): getting week day

We can get day of the week in different formats by using jddayofweek function. This function takes Julian day number as integer and returns the day . Here is the syntax

jddayofweek(Julian_day_numnber, mode )

Here is an example.

$day_number = cal_to_jd(CAL_GREGORIAN,5,4,2013);

$week_day = jddayofweek($day_number,0);

echo $week_day;

The output will be 6.
As we have used default format so the function will return 0 for Sunday , 1 for Monday ...
If we change the format like this

$week_day = jddayofweek($day_number,1);

The output will be Saturday

$week_day = jddayofweek($day_number,2);

The output will be Sat
Month name from Julian day count →
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