Are there arguments over when the other months of the Islamic calendar start and end?

Re: Are there arguments over when the other months of the Islamic calendar start and

Yes, several people have an Islamic calendar in their homes, but it’s only purpose is decoration and a way to maintain some cultural ties with back home. Do you ever say, “Hmmm, I think I will schedule an appointment for 17th shawwal, so that I can be free on the weekend of the 24th”.

I didn’t think so either.