Is it the Persian culture again you are looking to set? To be honest, i'm not sure what it should look like when put into Persian culture. I have attached a screenshot of my RadScheduler in MonthView with the Persian culture set so you can compare.
let me explain something , Persian Culture that comes with .Net framework does not have Persian Calendar into it(and microsoft accepted that this is a bug since .net 2.0 but dont want to solve it). so there is a workaround for sticking the Persian Calendar to the Persian Culture through the Reflection techniques.
now i have a Persian Cultureinfo that have persian calendare and works perfectly in all situations.
i set it to the Culture of radschedulder and it works perfectly in Day and Weekly views.
but in the month view the control works with Windows default culture and does not use what i assigned to Culture property. ( i believe that my persianCulture is complete and works well in all situations, and if control use it , it works like other normal cultures)