I learned it this way:

On Mondays I never goes to work,
On Tuesdays, I stays at home,
On Wednesdays, I never feel inclined,
Work is the last thing on my mind!
Thursday's an 'oliday, (shops all closed on Thursday afternoons)
And Fridays I detest.
It's too late to make a start on Saturday,
And Sunday is the day of rest.

London, 1958