When you say casual clothes, do you mean the clothes you usually wear when you first get married or the toast clothes? Getting married in May, the climate is most suitable for clothes. If you choose toasting clothes, I think the dress and cheongsam are very good, depending on whether you like Chinese or western style. The color should be festive and shiny, because you are the focus of that day, and the style should be generous. If you wear it at ordinary times, it is a good choice. Bright colors are ok, styles can be arbitrary, and the texture is better. You don't need to wear a suit, it will look very rustic and casual. I wish you happiness! If you are afraid of cold, wear a thin sweater and a spring and autumn coat. If you are not afraid, wear a T-shirt with a spring and autumn coat ~