Enter the first day you lived in Germany lawfully and every stay abroad. The clock follows § 12b of the citizenship act: up to six months away is fine, longer can reset it.
A planning aid based on § 9, § 10 and § 12b StAG as of September 2026. Crediting earlier years after a break is at the office's discretion, so the tool shows the date with and without it. The Landesamt für Einwanderung decides your case.