Rule 12. Defenses and Objections: When and How Presented; Motion for Judgment on the Pleadings; Consolidating Motions; Waiving Defenses; Pretrial Hearing
(a) Time to Serve a Responsive Pleading.
Unless another time is specified by a federal statute, the time for serving a responsive pleading is as follows:
(1) In General.
(A) A defendant must serve an answer:
(i) within 21 days after being served with the summons and complaint; or