The post above combines a possible kanji transliteration for "Sarah" (沙 = "sa", 羅 = "ra") with the date expressed using the Japanese era system (Heisei 28). It should be pointed out that names of foreigners are usually not written with kanji in Japanese, but with katakana.
Hence another possibility is:
サラとの結婚 (marriage (結婚) with Sarah (サラ))
2016年09月16日 (2016 year 09 month 16 day)