How would you interpret: "你的美如日; 你的智若猫头鹰"?
i would suggest:

其妍也﹒如冬之日﹒和煦可人

其智也﹒若夜之鴞﹒慎默覃思

here's a brief explanation:

his/her's beauty (妍), is like (如) the winter sun (冬之日), warm (和煦) &amp; pleasant (可人)

his/her's wisdom (智), is like (若) an owl (夜鴞), think (覃思) carefully (慎) and silently (默)

如冬之日 do not indicate the sun itself, it implied the sunshine in winter.

then, 鴞 is one of the name used in ancient time for owl.

have fun :)