"Whistle In"

When I listened to 1967: Sunshine tomorrow, I noticed a merism in the alternate versions of "All Day All Night (Whistle In)":

Remember the day (Day)
Remember the night (Night)

Both "day" and "night" are mentioned, but the sense is really "all of the time," as in the next line:  "All day long."

When I referenced the final version of "Whistle In" on Smiley Smile, I found that is also has melismas to give a sense of duration.  "Day" is sung to the notes B G# B, and "long" to the notes A# G# F#.