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# dateWithTimeIntervalSinceReferenceDate:

Creates and returns a date object set to a given number of seconds from 00:00:00 UTC on 1 January 2001.

```
+ (instancetype) dateWithTimeIntervalSinceReferenceDate:(NSTimeInterval) ti;
```

## Parameters

`ti`

The number of seconds from the absolute reference date (00:00:00 UTC on 1 January 2001) for the new date. Use a negative argument to specify a date and time before the reference date.

## Return Value

An `NSDate` object set to `ti` seconds from the absolute reference date.

## See Also

[`init(timeIntervalSinceReferenceDate: TimeInterval)`](/documentation/Foundation/NSDate/init(timeIntervalSinceReferenceDate:))

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


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