"Oh Happy Day" 是基督教的一首讚美詩，歌詞如下：
Oh happy day, oh festival,
When Christ was born of thee;
The angels sang, the shepherds heard,
And came to see the free.
May all, who worship God on earth,
With thee this day agree;
And when at length the day is past,
May all our praise renew.
Oh happy day, for Christ has died,
That sins might be forgiven;
The world is glad, the darkness gone,
For now our hope is set.
Oh happy day, oh blessed night,
When angels sang on high;
God's word proclaimed and heavenly joys
Now lastly shall be tried.
這是一首非常美麗的基督教讚美詩，它表達了對基督降生的喜悅和對死亡的慶祝，同時也表達了對上帝的敬拜和對未來的希望。如果您對基督教有任何興趣或問題，我會很樂意為您提供更多的信息。