Have you made "sima"-lemonade and donuts like Siiri and Iivari have done. This is their tradition. They have eaten donuts and drunk sima already in their childhood.
"Sima" lemonade is made of lemons, brown sugar, water and yeast. It takes 1-2 weeks to be drinkable.And getting older it contains alcohol.
This year the weather is really bad. There is slush on the ground and it is snowing and raining. They have to celebrate at home. They cook a good meal for themselves.
May Day is known as vappu in Finnish. This is a public holiday that is the only carnival-style street festivity in Finland. People young and old, particularly students, party outside, picnic and wear student caps.