INT 21 - DOS 2+ - SET FILE'S DATE AND TIME
AX = 5701h
BX = file handle
CX = new time (see AX=5700h)
DX = new date (see AX=5700h)
Return: CF clear if successful
CF set on error
AX = error code (01h,06h) (see AH=59h)

See also: 215700

215701 - DOS 2+ - SET FILE'S DATE AND TIME