The documentation for timing phrases does not include any specific examples of the timing phrase `30 years before Today()` which is interpreted as a matching date, rather than a relative comparison. Provide some examples to illustrate why it is an exact match and how to make it a relative comparison:

Yes, the addition of the offset duration to the timing phrase causes the translation to use same as semantics: X 30 years before Today() is a point comparison. To make it relative you can add the or less or or more modifiers: X 30 years or more before Today().

See the discussion here for more: https://chat.fhir.org/#narrow/stream/179220-cql/topic/Newbie.20Problems.20with.20.24evaluate-measure