Always walking out on a morning in May. Doesn't anybody do anything on a cold afternoon in February? (Wait a minute, we've got October's night and July which rhymes with July...) Ah, well, musicians can't count past 3 anyway (maybe 4).

Shanties and work songs often use the same lines because new verses were made up on the spot and lines freely stolen from other work songs.

Various conventions of phrase are traditional to the point of going back thousands of years, to Homer and his like. Easier to remember when reciting or singing the story.

Bat Goddess