A part of it was on a chocolate-wrapping, I found the entire poem and want to share it with you:
"Come when the nights are bright with stars
Or come when the moon is mellow;
Come when the sun his golden bars
Drops on the hay-field yellow.
Come in the twilight soft and gray,
Come in the night or come in the day,
Come, O love, whene’er you may,
And you are welcome, welcome.