jddayofweek(): getting week day

$day_number = cal_to_jd(CAL_GREGORIAN,5,4,2013);
$week_day = jddayofweek($day_number,0);
echo $week_day;

The output will be 6.

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 )

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

Example 2: Getting the Day as a String

Use jddayofweek() to return the name of the day:

$jd = gregoriantojd(9, 18, 2024); 
echo jddayofweek($jd, 1); // Outputs: Wednesday

Example 3: Getting the Numeric Day of the Week

$jd = 2459583;
echo jddayofweek($jd, 0); // Outputs: 1

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