Am Sonntag will mein Süßer mit mir segeln geh’n … is (was?) a popular German song. It was written in 1929 and as seen many cover versions, one even from the Beatles, sung in German.
Definitely not Silent Sunday
My Sweetheart Wants to Go Sailing with Me on Sunday
pictures imperfect blog 
I’m not a sailor, but this looks idyllic.
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