Concalo seems to clearly put this event onto the Tuesday "Tuesday May 1st
http://missingmadeleine.forumotion.net/t8375-chapter-2-madeleine-beth-mccann-s-holidayIn the Algarve, May 1st is celebrated by organising family picnics; the first snails are tasted and, above all, maios are displayed - life-sized rag dolls stuffed with straw - on the sides of the roads, in windows or on the doorsteps of the houses. They represent scenes from daily life or from social satire. This popular, one hundred-year-old tradition is carried on and joyously enlivens these first days of spring.
It's not known if Madeleine could see the maios that day. Between 10 and 11am, she plays mini-tennis with the children from the day centre. In the afternoon, from 1.30, her parents take her to the beach with her brother and sister, but they only stay there for twenty minutes, because the sky clouds over and the temperature falls. She eats an ice cream on a terrace. Close by, a guitarist, who looks like a tramp, is playing Latino music and collecting money. From there, Madeleine and the twins are taken directly to the day centre. Tennis court number 1 is booked by the McCanns for 2.30 to 3.30. At around 3.30, the play leaders take the children to the beach. They proceed in single file, each holding onto a long rod in the shape of a serpent, Sammy Snake. They play on the sand until 4.30 and participate in various games that are suggested to them.
During the parents' dinner, the children again sleep alone. A restaurant employee notes on the reception register that certain members of the group get up in turn to go and make sure they are OK.
For an hour and a quarter, between 10.30 and 11.45pm, in the apartment where she is in the company of her brother and her sister, Madeleine does not stop crying and calling out for her father. She does not calm down until after her parents return."