Christian priest martyred in Rome in the third century, whose feast day, 14 February, became Valentine's Day, 情人节 in Chinese. Little is known about his life.
Shèng Wǎlúntīng Jié jiùshì wǒmen shuō de Qíngrénjié.
Saint Valentine's Day is what we call Lovers' Day in Chinese.
Tips
memory
瓦 'wa' + 伦 'lun/len' + 汀 'ting/tin' = 'Va-len-tin'. 瓦 is the standard Chinese character for foreign 'Va-' starts (compare 瓦尔特 Walter, 瓦格纳 Wagner). The English-friendly 'Valentine' is more often rendered 瓦伦丁 (with 丁 ending) - 瓦伦汀 with 汀 is a less common but valid variant; both refer to the same name.
culture
China has its own lovers' days besides 14 February: 七夕, the seventh night of the seventh lunar month, when the Cowherd and the Weaver Girl meet, and 20 May, because 520 (wǔ èr líng) sounds like 我爱你 'I love you'.