Market days and newsletters the markets do not count(apply) for a long time(long ago) more than confidential tip and thus tourist masses flow out especially(particularly) during the summer months, e.g., on the Wednesday market in Sineu. This otherwise rather quiet and sleepy place changes thus in the very early(prior) morning into a living(lively) market with fairground, human masses, an animal show and a big(great) offer(supply) of clothes, leather goods and more.
Market days 
Here you find an overview about the market days on Majorca:
Monday:
Caimari, Calvià, Lloret, Manacor, Mancor, Montuiri, Sòller
Tuesday:
Alcúdia, Artà, Campanet, Alqueria Blanca, Llubí, Porreres, Santa Margalida, Sóller, Arenal
Wednesday:
Andratx, Capdepera, Colònia Sant Jordi (nachmittags), Llucmajor, Petra, Port de Pollenca, Santanyì, Selva, Sencelles, Sineu, Vilafranca, Sòller, Sa Cabana
Thursday:
Arenal (Flohmarkt), Ariany, Campos, Consell, Inca, Pòrtol, Sant Joan, Sant Llorenç, Ses Salines, Sóller
Friday:
Algaida, Arenal, Binissalem, Sa Cabaneta, Ca'n Picafort, Llucmajor, Maria de la Salut, Son Servera, Sòller, Son Carriò, es Pont d`Inca, Llucmajor (Flohmarkt)
Saturday:
Alaró (Kunsthandwerk), Bùger, Bunyola, Cala Ratjada, Costitx, Lloseta, Palma, Santa Eugènia, Santa Margalida, Santanyì, Sòller, Campos, Bahia Gran, Esporles, Horta, Magaluf, Portocolom
Sunday:
Alcùdia, Inca, Felanitx, Llucmajor, Muro, Pollenca, Porto Cristo, sa Pobla, Santa Marià, , Binissalem (Kunstmarkt), Consell (Flohmarkt), Artà (Flohmarkt, jeden 1. Sonntag im Monat)
by the way, there is also....
Internet on the beach 
The persons who dispose of a laptop with WLAN adaptor can surf on the beaches(seashores) Calvias without cable and for free on the Internet. Now the suitable devices have been started running(have been put into service) by Minister for Economic Affairs Ayreflor and Calvias mayor Carlos Delgado. Now specifically the beaches(seashores) are it Carregador, the Playa grain and Son Matíes of Palmanova, the beach(seashore) of Santa Ponça and the beach(seashore) of Romana and Torá with Paguera. From June surfing without cable will be possible on the Internet also on the beach(seashore) of Illetas.
Spring(Source): inselradio.com