It's 7 years from 'last validly date'
are you sure? see below
from:
https://www.easa.europa.eu/sites/def...-FCL-Jun20.pdf
FCL.625 IR – Validity, revalidation and renewal Regulation (EU) 2019/1747
(a) Validity An IR shall be valid for 1 year.
(b) Revalidation (1) An IR shall be revalidated within the 3 months immediately preceding its expiry date by complying with the revalidation criteria for the relevant aircraft category. (2) If applicants choose to fulfil the revalidation requirements earlier than prescribed in point (1), the new validity period shall commence from the date of the proficiency check. (3) Applicants who fail to pass the relevant section of an IR proficiency check before the expiry date of the IR shall exercise the IR privileges only if they have passed the IR proficiency check.
(c) Renewal If an IR has expired, in order to renew their privileges, applicants shall comply with all of the following: (1) complete a refresher training at an ATO, if deemed necessary by the ATO to reach the level of proficiency needed to pass the instrument element of the skill test in accordance with Appendix 9 to this Annex; (2) pass a proficiency check in accordance with Appendix 9 to this Annex in the relevant aircraft category; (3) hold the relevant class or type rating unless otherwise specified in this Annex.
(d) If the IR has not been revalidated or renewed in the preceding 7 years, applicants for the IR shall pass again the IR theoretical knowledge examination and skill test.