Epoch to Date & Swift Converter

Unix Timestamp to Date Converter for Swift

Convert epoch timestamps (seconds & milliseconds) to human UTC/Local dates and produce instant Date(timeIntervalSince1970:) Swift code.

Current Unix Epoch Time:

1728734400

Seconds since Jan 01 1970 (UTC)

Enter Unix Timestamp (Seconds or Milliseconds):

UTC Time

Sat, 12 Oct 2024 12:00:00 GMT

Local Time

Sat Oct 12 2024 13:00:00 GMT+0100 (British Summer Time)

ISO 8601 (RFC 3339)

2024-10-12T12:00:00.000Z

Relative to Current Time

now

Swift timeIntervalSince1970

let date = Date(timeIntervalSince1970: 1728734400.0)
// Sat, 12 Oct 2024 12:00:00 GMT

Apple Cocoa Epoch (2001)

// Apple Reference Date (since Jan 1, 2001 00:00:00 UTC)
let appleEpochSec = 750427200.0
let date = Date(timeIntervalSinceReferenceDate: appleEpochSec)

Epoch Dates in the Apple Ecosystem

Unix Epoch (1970)

Standard seconds elapsed since midnight UTC on January 1, 1970. Used by REST APIs, JWT tokens, and Unix databases.

Apple Cocoa Epoch (2001)

Apple Core Foundation & Foundation frameworks internally use seconds since midnight UTC on January 1, 2001 via timeIntervalSinceReferenceDate.

Seconds vs Milliseconds

JavaScript APIs and Java servers often pass 13-digit millisecond timestamps. Swift requires division by 1000 before passing into Date(timeIntervalSince1970:).

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