Some Belgian cities hold Carnivals during Lent. One of the best-known is Stavelot, where the Carnival de la Laetare takes place on <answer>Laetare Sunday</answer>, the fourth Sunday of Lent. The participants include the Blancs-Moussis, who dress in white, carry long red noses and parade through town attacking bystanders with confetti and dried pig bladders. The town of Halle also celebrates on <answer>Laetare Sunday</answer>. Belgium's oldest parade is the Carnival Parade of Maaseik, also held on <answer>Laetare Sunday</answer>, which originated in 1865.
What day does the town of Halle engage in its celebration?
Laetare Sunday