exact date

She died early, though the exact date is not known, certainly before 1717.

He died in 1310, but the exact date of his death is not certain.

The exact date of the name change is not available.

She hadn't told anyone the exact date of her return.

The exact date of his death is not known, but he probably died around 1105.

He could even work out something close to an exact date.

The exact date has not been set, but is expected to probably be in March 1988.

The exact date of his death is not known; some say about 1580.

The exact date of his death and where it happened are not known.

I'd have to find my old account books to give an exact date.