Date Shifter

The Date Shifter offsets dates by a per-patient salt so relative timing within a patient is preserved while calendar dates are not re-identifiable.

Preserve relative timing

Lab sequences and visit order stay clinically meaningful inside a cohort even though absolute dates are shifted.

Responsibilities

Consistent shift per patient across all events in the export batch.
Runs after Identifier Scrubber.
Documented shift metadata kept out of researcher-facing tables.

Date Shifter

The Date Shifter offsets dates by a per-patient salt so relative timing within a patient is preserved while calendar dates are not re-identifiable.

Preserve relative timing

Lab sequences and visit order stay clinically meaningful inside a cohort even though absolute dates are shifted.

Responsibilities

Consistent shift per patient across all events in the export batch.
Runs after Identifier Scrubber.
Documented shift metadata kept out of researcher-facing tables.