Windows Timestamp Converter [2025]

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Convert Windows/Integer8 timestamps to readable dates. Essential for Active Directory administration and Windows system analysis.

✓ Windows Format Support✓ PowerShell Commands✓ Multiple Time Formats

Understanding Windows Timestamps

Format Specification

  • Time Base

    100-nanosecond intervals since January 1, 1601 UTC

  • Data Type

    64-bit integer (Integer8/FILETIME)

  • Range

    Up to year 30828 with 100ns precision

Common Uses

  • Active Directory

    User account timestamps

  • Windows File System

    File creation and modification times

  • System Events

    Event logs and system changes

Common Integer8 Attributes

User Properties

  • accountExpires

    Account expiration date

  • lastLogon

    Last successful login time

  • pwdLastSet

    Last password change time

  • badPasswordTime

    Last failed password attempt

System Properties

  • lockoutTime

    Account lockout timestamp

  • lockoutDuration

    Duration of account lockouts

  • maxPwdAge

    Maximum password age

  • minPwdAge

    Minimum password age

Command Line Tools

PowerShell

# Convert to local time

[datetime]::FromFileTime("132463843855875757")

# Convert to UTC

[datetime]::FromFileTimeUTC("132463843855875757")

W32TM

# Windows Time Command

w32tm /ntte 132463843855875757

Frequently Asked Questions

Why does Windows use 1601 as the epoch?

Windows uses January 1, 1601 as its epoch because this was the start of the Gregorian calendar adoption. This date was chosen by Microsoft for consistency with the NTFS file system.

What's the significance of 100-nanosecond intervals?

The 100-nanosecond precision allows for extremely accurate timing measurements needed for system operations, file timestamps, and synchronization in distributed systems.

How do special values work?

Some Integer8 fields accept special values like 0 (never expires) or -1 (immediately expires). These values should be handled according to the specific attribute's documentation.

Are timestamps stored in UTC?

Yes, Windows timestamps are always stored in UTC (Coordinated Universal Time). They're converted to local time for display purposes when needed.

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