“开心每一天”的英文是：Happy every day。

“开心”的英文是：happy；“每一天”的英文是：every day。所以“开心每一天”是“Happy every day”。短语：开心过好每一天：Happy good every day；快乐健身每一天：Happy fitness every day；快乐的过每一天：Happy over every day。