YOU SAID:

I saw three ships coming sailing in on Christmas day

INTO JAPANESE

クリスマスに3本の船が出航するのを見た

BACK INTO ENGLISH

I saw three ships leaving at Christmas

INTO JAPANESE

私はクリスマスに3隻の船が出ている

BACK INTO ENGLISH

I have three ships on Christmas

INTO JAPANESE

私はクリスマスに3つの船を持っている

BACK INTO ENGLISH

I have three ships at Christmas

INTO JAPANESE

私はクリスマスに3つの船を持っている

BACK INTO ENGLISH

I have three ships at Christmas