Do I need to specify my arrival date when applying for a Thai visa?

The user inquires about the necessity of providing a specific arrival date when applying for a Thai visa, expressing uncertainty about their travel plans but wanting to secure the visa in advance. Comments reveal that the visa is valid from the approval date and that once collected, it remains valid for five years. It's noted that if the applicant arrives in Thailand before visa approval, they must leave and re-enter to activate the DTV.