---
title: startDate
framework: SensorKit
role: symbol
role_heading: Instance Property
platforms: [iOS 26.0+, iPadOS 26.0+, Mac Catalyst 26.0+]
path: sensorkit/srsleepsession/startdate
---

# startDate

## Declaration

```swift
var startDate: Date { get }
```

## Discussion

Discussion Start date of sleep session