The Evenflo Chase Booster expires 6 years after its date of manufacture, according to Evenflo.
What the maker says:
All Evenflo car seats expire 6 years following their date of manufacture, with a few exceptions
Note: Manual p24 says 'expiration date found on the date of manufacture label'. No year count in manual.
Source: www.evenflo.com, checked 2026-10-24.
Look up another model, or work out the date from a manufacture date