Longest gaps between song listenings

The following are some songs which has the biggest gap of time between hearing them for the last time and listening to them again.

Masahiko Kondo - Yuuyake no uta (sunset song) [1989]

I first heard this exquisite ballad more than 25 years ago as a Chinese cover, discovered apparently the Japanese original today, 9th September 2016. Starting point :midomi.com; whoever created this site is a genius.

Agnes Chan - Sweet Dreams (1971)

A few years back, I heard this song again for the first time in what I estimate to be 37 years.

Tinikling (Filipino folk music)

I vaguely remember the melody when the then Philippine President Marcos visited Sabah in the mid 1970s. It totally escaped me until I heard it again relatively recently, 40 years later.

The Ronald Binge Orchestra - Elizabethan Serenade

I last heard this beautiful melody back in the early 1970s, and finally heard it again about 40 years later.

Nina Astaria & Borry Saiya -- Apa Salahku (1988)
Ratih Purwasih - Tiada Cinta Untukmu Lagi (1987)
Ratih Purwasih - Habis Manis Sepah Dibuang (1987)

During a summer break I worked as a bus conductor for 2 months in 1990. That's when I heard the above 3 songs, which proved to be hard to track down. 25 years later, I finally did, with help from the tremendous blog Tembang Kenangan.