The phrase for "阳光明媚" in Engpsh is "Bright and sunny."
The origin of the phrase is from the characteristic of bright and warm weather, which is often associated with a positive and happy atmosphere.
Example sentences in Engpsh:
The weather is so beautiful, it's bright and sunny.
We went for a walk on the beach on a bright and sunny day.
Example sentences in Chinese:
天气真好，阳光明媚。
我们在阳光明媚的一天去海滩散步。