Sunday best

US /ˈsʌn.deɪ best/
UK /ˈsʌn.deɪ best/
"Sunday best" picture
1.

melhores roupas, roupa de domingo

one's best clothes, worn for a special occasion or to church

:
She always wears her Sunday best when she goes to church.
Ela sempre usa suas melhores roupas quando vai à igreja.
He was dressed in his Sunday best for the wedding.
Ele estava vestido com suas melhores roupas para o casamento.