Of what ceremony in England was the Election Day pageantry a pale imitation in Chapter 21 of "The Scarlet Letter"?

The pageantry celebrated in England was called "Mothering Sunday." It was held during the fourth Sunday of Lent and was meant to honor all mothers. Given the circumstances of the Scarlet Letter, this connection is especially ironic. Hawthorne changes the title of the day to Election Day but those familiar with mothering Sunday surely got the connection.