What time would be on a 16 year sencense of 16 years?

A "16-year sentence of 16 years" seems to be a redundant phrase, as a sentence of 16 years is simply 16 years long. If you're asking about the end time of a 16-year sentence, it would depend on the starting date. For example, if the sentence began on January 1, 2020, it would conclude on January 1, 2036.