Windows Timestamp Converter [2025]
Convert Windows/Integer8 timestamps to readable dates. Essential for Active Directory administration and Windows system analysis.
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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