Engagement is another very excited moment. What to wear in that occasion? Should I wear a dress as formal as wedding? Yes, you do not need to wear. In the engagement you can wear what you want. For example, T-shirt, jeans, or a formal prom dress. It is depends on you. The only thing you should consider is comfortable and dress up yourself pretty. On my engagement day, I chose a long prom dress. It is simple and formal. I do not want my engagement is too casual. The color was champagne. I like champagne color. champagne compliment my skin, I look terrific in this color. But some of my friends choose t-shirt and jeans. They like casual and comfortable style. Their engagement is also great. So what kind of engagement dress to wear, it is depends on your feeling. You feel comfortable is the only standard.