---
title: startDate
framework: healthkit
role: symbol
role_heading: Instance Property
path: healthkit/hkquantityseriessamplebuilder/startdate
---

# startDate

The starting date and time for the sample.

## Declaration

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

## See Also

### Creating a Quantity Series Builder

- [init(healthStore:quantityType:startDate:device:)](healthkit/hkquantityseriessamplebuilder/init(healthstore:quantitytype:startdate:device:).md)
- [quantityType](healthkit/hkquantityseriessamplebuilder/quantitytype.md)
- [device](healthkit/hkquantityseriessamplebuilder/device.md)