On my Calendar page, the day of the week names are not correct for the date given. What did I do wrong?

It is likely that you have selected the wrong year.  You should go to your Update Calendar page and make sure the correct year is selected for that date.

On the Update Calendar page, the date is given in three parts: month, day, and year. The day of the week is computed from this date. The day of the week displayed on the page should be accurate for the month, day, and year combination you've selected.