When Charging Murder, Is the Offense Date the Date of the Attack, or the Date of the Victim's Death?

Suppose that Dan shoots Victor on January 1, and that Victor dies from his wounds, but not until January 3. When a magistrate issues an arrest warrant, or the grand jury returns an indictment, should the date of offense be listed as January 1, the date of the attack? Or January 3, the date of the victim's death? My view is that either one is probably fine, but that alleging a range of dates spanning the assault and the victim's death is the best solution. Here are summaries of some relevant cases: State v. Price, 310 N.C. 596 (1984) (defendant shot victim on December 17, but victim did not die until February 5; murder indictment initially listed February 5 as the offense date, but the state moved to, and was allowed to, amend the date to December 17; court characterizes this as “the date the offense occurred” and ruled that the amendment was proper as it did not substantially alter the charge; also states that “the date on the indictment for murder, if erroneous, was not an essential element of the offense” and cites G.S. 15-155, which provides that errors as to date are not fatal defects) State v. Holton, 284 N.C. 391 (1973) (defendant shot victim in September, but victim did not die until December; indictment gave the September date as the date of the offense; no fatal variance between allegation and proof: “The indictment in this case stated the date on which the fatal injury was inflicted rather than [...]