---
title: OSLogInt32ExtendedFormat.secondsSince1970
framework: os
role: symbol
role_heading: Case
path: os/oslogint32extendedformat/secondssince1970
---

# OSLogInt32ExtendedFormat.secondsSince1970

A format that displays a 32-bit integer as a date.

## Declaration

```swift
case secondsSince1970
```

## Discussion

Discussion Use this option to format the interpolated value as a date and time, such as 2007-01-09 09:41:00. The formatter considers the value you provide as a duration, in seconds, and adds it to the UNIX epoch to calculate the date it displays. The UNIX epoch is a method of describing a specific point in time using the elapsed number of seconds since 00:00:00 UTC January 1, 1970. The following example applies the secondsSince1970 formatter to the 32-bit integer value 604_800, which is the exact number of seconds in one week: // Create a logger with the specified subsystem and category. let logger = Logger(subsystem: "com.example.OSLogValueFormatting",                     category: "Formatter Output")                  // Assign the value to interpolate. In this case, the number of // seconds in an entire week. let value: Int32 = 604_800                  // Write the value to the log using the specified format. logger.info(".secondsSince1970 output is \(value, format: .secondsSince1970)") And the system writes the following message to the log: [Formatter Output] .secondsSince1970 output is 1970-01-08 00:00:00

## See Also

### Getting the Formats

- [OSLogInt32ExtendedFormat.ipv4Address](os/oslogint32extendedformat/ipv4address.md)
- [OSLogInt32ExtendedFormat.darwinErrno](os/oslogint32extendedformat/darwinerrno.md)
- [OSLogInt32ExtendedFormat.darwinMode](os/oslogint32extendedformat/darwinmode.md)
- [OSLogInt32ExtendedFormat.darwinSignal](os/oslogint32extendedformat/darwinsignal.md)
- [OSLogInt32ExtendedFormat.bitrate](os/oslogint32extendedformat/bitrate.md)
- [OSLogInt32ExtendedFormat.bitrateIEC](os/oslogint32extendedformat/bitrateiec.md)
- [OSLogInt32ExtendedFormat.byteCount](os/oslogint32extendedformat/bytecount.md)
- [OSLogInt32ExtendedFormat.byteCountIEC](os/oslogint32extendedformat/bytecountiec.md)
- [OSLogInt32ExtendedFormat.truth](os/oslogint32extendedformat/truth.md)
- [OSLogInt32ExtendedFormat.answer](os/oslogint32extendedformat/answer.md)