---
title: HKSampleSortIdentifierStartDate
framework: healthkit
role: symbol
role_heading: Global Variable
path: healthkit/hksamplesortidentifierstartdate
---

# HKSampleSortIdentifierStartDate

A constant for sorting samples based on their start date.

## Declaration

```swift
let HKSampleSortIdentifierStartDate: String
```

## See Also

### Specifying Sort Identifiers

- [HKSampleSortIdentifierEndDate](healthkit/hksamplesortidentifierenddate.md)