Enter any number — automatically detects the timestamp type and epoch
Enter any integer — Unix timestamp, Windows FILETIME,
Java milliseconds, .NET ticks, GPS time, NTP and more.
Sub-millisecond precision is fully preserved via BigInt.
| Name | Epoch (origin) | Unit | Typical length | Used by |
|---|---|---|---|---|
| Unix Time | 1970-01-01 00:00:00 UTC | seconds | 10 digits | Linux, C, Python, PHP, databases |
| Java / JavaScript Time | 1970-01-01 00:00:00 UTC | milliseconds | 13 digits | Java, JavaScript Date.now(), Android |
| Unix Microseconds | 1970-01-01 00:00:00 UTC | microseconds | 16 digits | Python time.time_ns(), precise logging, databases |
| Unix Nanoseconds | 1970-01-01 00:00:00 UTC | nanoseconds | 19 digits | Go time.Now().UnixNano(), Rust, HPC systems |
| Windows FILETIME | 1601-01-01 00:00:00 UTC | 100-ns intervals | 18 digits | Windows API, NTFS, Active Directory, LDAP |
| .NET DateTime.Ticks | 0001-01-01 00:00:00 UTC | 100-ns intervals | 18–19 digits | C# DateTime.Ticks |
| NTP Timestamp | 1900-01-01 00:00:00 UTC | seconds | 10 digits | Network Time Protocol (RFC 5905) |
| GPS Time | 1980-01-06 00:00:00 UTC | seconds | 10 digits | GPS satellites & receivers (no leap seconds) |
| Apple / Cocoa Time | 2001-01-01 00:00:00 UTC | seconds | 9–10 digits | macOS, iOS, Core Data, Swift |
| OLE / Delphi Date | 1899-12-30 00:00:00 UTC | days (fractional) | 5 digits + decimal | Microsoft Excel, COM, Delphi, VBScript |
| Julian Day Number | 4713-01-01 BC 12:00 UTC | days | 7 digits | Astronomy, calendar calculations |
| Modified Julian Date | 1858-11-17 00:00:00 UTC | days | 5 digits | Astronomy, ESA, NASA |