(PHP 4, PHP 5)
GregorianToJD — ･ｰ･�ｴ･�ｦ･ｹﾆ�讌�ｦ･ｹﾀﾑｻｻﾆ�ﾋﾊﾑｴｹ､ｹ､�
ﾍｭｸ妤ﾊ･ｰ･�ｴ･�ｦ･ｹﾎﾎﾈﾏｰﾏ､ﾏｵｪｸｵﾁｰ 4714 ﾇｯ､ｫ､魴ｪｸｵ 9999 ﾇｯ､ﾞ､ﾇ､ﾇ､ｹ｡｣
､ｳ､ﾎ･ｽ･ﾕ･ﾈ･ｦ･ｧ･｢､ﾏﾆ�ﾕ､ｱ､ｴ､ﾆｵｪｸｵﾁｰ 4714 ﾇｯ､ﾋ､ｵ､ｫ､ﾎ､ﾜ､�ｳ､ﾈ､ｬ ｽﾐﾍ隍ﾞ､ｹ､ｬ｡｢､ｳ､ﾎﾍﾍ､ﾊｻﾈ､､ﾊ�､ﾏﾆﾃ､ﾋｰﾕﾌ｣､ｬ､｢､��ｱ､ﾇ､ﾏ､｢､熙ﾞ､ｻ､｣ ･ｰ･�ｴ･�ｦ･ｹﾎﾏ 1582 ﾇｯ 10 ｷ� 15 ﾆ�(･讌�ｦ･ｹﾎﾇ､ﾏ 1582 ﾇｯ 10 ｷ� 5 ﾆ�)､ﾞ､ﾇﾀｩﾄ熙ｵ､�ﾆ､､､ﾞ､ｻ､ﾇ､ｷ､ｿ｡｣ ､ｳ､ﾎﾎﾏ｡｢､､､ｯ､ﾄ､ｫ､ﾎｹﾇ､筅ﾃ､ﾈｸ螟ﾞ､ﾇｼｱﾆ�､�鬢�ﾞ､ｻ､ﾇ､ｷ､ｿ｡｣ ﾎ网ｨ､ﾐ｡｢･､･ｮ･�ｹ､ﾏ 1752 ﾇｯ｡｢･愠ｷ･｢(USSR)､ﾏ 1918 ﾇｯ｡｢･ｮ･�ｷ･网ﾏ 1923 ﾇｯ､ﾋ ｰﾜｹﾔ､ｷ､ﾞ､ｷ､ｿ｡｣ ､ﾛ､ﾈ､ﾉ､ﾎ･陦ｼ･愠ﾃ･ﾑ､ﾎｹｹ､ﾇ､ﾏ｡｢･ｰ･�ｴ･�ｦ･ｹﾎﾎﾁｰ､ﾏ ･讌�ｦ･ｹﾎﾈﾍﾑ､ｷ､ﾆ､､､ﾞ､ｷ､ｿ｡｣
ｷ釥ｽ､ｹ｡｢1 (January) ､ｫ､� 12 (December) ､ﾞ､ﾇ､ﾎｿ奛｣
ﾆ�ｽ､ｹ｡｢1 ､ｫ､� 31 ､ﾞ､ﾇ､ﾎｿ奛｣
ﾇｯ､ｽ､ｹ｡｢-4714 ､ｫ､� 9999 ､ﾞ､ﾇ､ﾎｿ奛｣
ｻﾘﾄ熙ｷ､ｿ･ｰ･�ｴ･�ｦ･ｹﾆ�讌�ｦ･ｹﾀﾑｻｻﾆ�ﾋ､ﾊ､ｪ､ｷ､ｿｷ�ﾌ､ﾖ､ｷ､ﾞ､ｹ｡｣
ﾎ�1 ･ｫ･�ﾀ｡ｼｴﾘｿ�
<?php
$jd = GregorianToJD(10, 11, 1970);
echo "$jd\n";
$gregorian = JDToGregorian($jd);
echo "$gregorian\n";
?>