php配列に関しまして

phpを覚えたく配列の勉強をしているのですが
＄aaaの配列を＄bbbと＄cccに変更したく
foreachで回して変更する方法をおしえ教えて頂けないでしょうか？
＄cccは0からではなく1からカウントするように変更を行いたいです。

$aaa= array(
"2022-01-01" => array(
"0" => '1',
"1" => '10',
"2" => '20',
"3" => '40',
"4" => '50',
),
"2022-01-02" => array(
"0" => '100',
"1" => '200',
"2" => '300',
"3" => '350',
"4" => '400',
),
);

$bbb = array(
"2022-01-01" => array(
"1" => '1',
"10" => '10',
"20" => '20',
"40" => '40',
"50" => '50',
),
"2022-01-02" => array(
"100" => '100',
"200" => '200',
"300" => '300',
"350" => '350',
"400" => '400',
),
);

$ccc= array(
"2022-01-01" => array(
"1" => '1',
"2" => '10',
"3" => '20',
"4" => '40',
"5" => '50',
),
"2022-01-02" => array(
"1" => '100',
"2" => '200',
"3" => '300',
"4" => '350',
"5" => '400',
),
);