What are the entry deadlines for a Destination Thailand Visa (DTV)?

The user is uncertain about the validity period of their Destination Thailand Visa (DTV), which is valid from May 10, pending travel plans that have changed. Community responses clarify that the visa remains valid for up to five years from the date of issue, but entry must occur before the visa's expiration date. It is noted that the DTV operates similarly to a regular tourist visa, requiring entry between the issued date and the validity end date.