persian calendar for liferay6

[homa programmer, modificado hace 12 años.]

hi,

I install liferay-portal-6.0.6 and tomcat-6.0.29 and just run
now i want to change its calendar to iranian calendar ....(persian calendar) I found this calendar for version liferay4 but i dont know how can i use it:-?? or if becuase of its version cant use it for version 6 how can i start to write my own calendar for liferay6
i have it algoritm but i dont know how start in liferay?

I am a beginner
plz help me
thanks