PHP Reference
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Quick Reference

The PHP jddayofweek() function returns the day of the week.

<?php
$jd = gregoriantojd(9, 5, 2023);
echo jddayofweek($jd, 1);
?>

Output

Tuesday

Syntax

jddayofweek(jd, mode)

Parameters

ParameterDescription
jdA Julian Day number (required)
modeSpecifies how to return the weekday:

  • 0 - Returns the weekday as an integer (0=Sunday, 1=Monday, etc.) (default)

  • 1 - Returns the weekday as a string (Sunday, Monday, etc.)

  • 2 - Returns the weekday as a string, abbreviated form (Sun, Mon, etc.)

PHP Notes:

  • When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
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