---
title: "init(timeIntervalSinceReferenceDate:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/date/init(timeintervalsincereferencedate:)"
---

# init(timeIntervalSinceReferenceDate:)

Creates a date value initialized relative to 00:00:00 UTC on 1 January 2001 by a given number of seconds.

## Declaration

```swift
init(timeIntervalSinceReferenceDate ti: TimeInterval)
```

## See Also

### Creating a Date

- [init()](foundation/date/init().md)
- [init(timeIntervalSinceNow:)](foundation/date/init(timeintervalsincenow:).md)
- [init(timeInterval:since:)](foundation/date/init(timeinterval:since:).md)
- [init(timeIntervalSince1970:)](foundation/date/init(timeintervalsince1970:).md)