You are invited to a special dinner and awards night!
In an earlier post, I gave the following definition of casual:
Casual = Nicer, but still fairly relaxed. Due to geographical variations, I prefer to not define this category too precisely. Lunch with your boss, your pastor, or your grandma requires casual clothing. Business casual fits here.
Now, in High School semi-formal meant that instead of being able to wear something special, you wore an everyday dress; and your chances were about zero that your date would be wearing anything nice at all. And my daughter reminds me that a semi-circle is half a circle. So, what does that make semi-casual? Something half as nice as what you would wear to lunch with your grandma.
Yet another dinner where I can’t feel appropriately dressed in anything but jeans. Somehow, I don’t think that was the effect they were after.