On a sunny sunny day.

在一个阳光灿烂的一天。

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Sunny sunny, don't forget your sunglasses.

晴天晴天，不要忘记拿你的太阳眼镜。

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A beautiful sunny sunny Saturday! Himalayas Art Museum, Thumb Plaza, Shanghai.

美丽的阳光灿烂的周六！喜马拉雅美术馆，大拇指广场，上海。

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It says ultraviolet radiation from the sun can reach you on cloudy days, as well as bright and sunny ones.

VOA: special.2010.07.06

But I choose to walk, and just walking in the seasons whether it's snowing or raining, or gorgeous sunny fall day.

但是我选择走路，什么季节都是如此,无论是雪天，雨天，亦或是秋高气爽。

普林斯顿公开课 - 人性课程节选

Especially on a day like this, a nice, hot, sunny day like this, the park's a lot busier.

特别是在一个这样的日子，美好的、温暖的、阳光的一天，公园会更热闹。

海德公园的氛围 - SpeakingMax英语口语达人

For those who came in on sunny days, the added distraction of the sunny-day photographs had little effect on performance.

FORBES: Why Bad Weather Is Good for Productivity (Blizzards Notwithstanding)

On the other hand, people who grow up in warm, sunny climates, have warm, sunny personalities: They're friendly, lighthearted, attractive, physically fit, vapid ignoramuses who drive with the top down and create marshmallow art for beach parties.

NPR: A Paean to the Music of Summer

By the time the agent got on the phone with me, I knew what flights were viable, and that going through San Francisco was OK because the weather there was sunny and predicted to stay sunny for the next few days.

FORBES: The Modern Business Traveler: Top 5 Things That Will Keep Your Travel on Track