某年某月某日雨昔年昔月昔日情
[mŏu nián mŏu yuè mŏu rì yŭ xī nián xī yuè xī rì qíng]
On a Certain Year/Month/Day in Rain - Longing From The Past: Such poetic naming shows an intense attachment or memory of something precious happened under similar circumstances before; also, perhaps hints of unspoken sorrows or nostalgia during rainy weather.