When Winx Club started?Kada su winx stvarno pocele?

Well da,when winx club awesome show've started?I always thouhht that winx started 2003.But,then while yesterday creating "Bloom's Happy Birthday Post" i wrote Happy 23th birthday,but then i saw my friends Phoebe wrote 20th birthday,then i checked and i saw some other blog wrote 20th birthday.I thought its 23th cause i thought winx created in 2003 and Bloom on start of show had 16 years.So 2010(today's year) - 2003(year of when winx have been created) = 7 >>> So 16+7=23 Thats how i got 23 years.But i am interested to see how you all guys got 20th!?And then i did little reaserch and found this...
This one is from Official movie site and its clearly as i thought says 2003...but then>>>

This is Winx on Wikipedia page and its says 2004!?

Although we all know that Wikipedia isn't really trustable i searched a little bit more,and found this>>>>

Its an part of artical from Iginio Straffi's official web site and its says also 2004.So i dont know what to think anymore,cause i would more trust to official movie site cause well i dont know but i just trust him more.So i don't know what to think anymore,are Winx created in 2003,or earier 2004? ><

Pa izvinite ali,ne mogu sve ovo sada da pisem bas i na srpskom pa cu uktratko.Da li mislite da su Winx napravljenje u 2003 ulli 2004 godini?Ja sam mislio da Blum puno 23 godine zato sto sam mislio da su winx stvorene u 2003,a na pocetku Blum je imala 16 godina.Pa 2010(danasnja godina) minus 2003 daje ukupno 7....Pa 7 plus Bluminih tadasnjih 16 godina daju 23.Ali neki su pisali da je nepunila 20!?!Gore sam pronasao nesta sta bi trebalo da dokaze u kojoj godini su winx ustvari i napravljene,ali imamo dva podatka 2003 i 2004 tako da nzm vise sta da mislim,sta vi mislite kada su winx ustvari stvorene?