晴れ着 Sunday best [suit, clothes]●best bib and tucker●best kimono●braw〈主にスコット〉〔通例 braws〕●festive dress●gala attire●glad rags

晴れ着で in gala costume

晴れ着で着飾っている be decked out in one's holiday attire

晴れ着を着た女の子 girl in festive dress

晴れ着を着て en fete〈フランス語〉●in Sunday attire●in gala●in holiday array●in one's Sunday best●in one's best●in one's best bib●in one's best bib and tucker

晴れ着を着る clothe oneself in one's best●dress in one's best bib and tucker●wear one's best dress