DateTime function should use time zone of the evaluation request

[brynrhodes]

The following expression:

DateTime(2024, 10, 3, 15, 54, 0, 0)

should result in a DateTime value with the timezone offset of the evaluation request: https://cql.hl7.org/09-b-cqlreference.html#datetime-1

However, looking at the code, the local timezone is always used:

https://github.com/cqframework/clinical_quality_language/blob/master/Src/java/engine/src/main/java/org/opencds/cqf/cql/engine/runtime/DateTime.java#L94

[antvaset]

Hi @brynrhodes, I've added tests for this here: #1423

It looks like it picks up the timezone offset of the evaluation request as per the spec.

When you call engine.expression(...) or engine.evaluate(...) you have to pass in the evaluation date time explicitly every time, otherwise it gets reset to ZonedDateTime.now().