LDAP Timestamp Converter [2025]
Convert Active Directory timestamps to human-readable dates. Essential for system administrators and Windows developers.
Understanding LDAP Timestamps
Format Specification
- •
Time Base
100-nanosecond intervals since January 1, 1601 UTC
- •
Format Length
18-digit integer or scientific notation
- •
Precision
High precision with nanosecond accuracy
Common Uses
- •
Active Directory
User account timestamps, password expiry
- •
Windows System
File creation times, system events
- •
System Logs
Event logs, security audits
Common LDAP Attributes
User Attributes
- •
pwdLastSet
Last password change timestamp
- •
accountExpires
Account expiration date
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lastLogon
Last successful login time
System Attributes
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whenCreated
Object creation timestamp
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whenChanged
Last modification time
- •
badPasswordTime
Last failed login attempt
Frequently Asked Questions
Why do LDAP timestamps start from 1601?
The Windows NT timestamp format starts from January 1, 1601, as this was the start of the Georgian calendar adoption. This date was chosen by Microsoft for consistency with the NTFS file system.
How accurate are LDAP timestamps?
LDAP timestamps provide extremely high precision with 100-nanosecond intervals. This level of precision is useful for system events and debugging but may be more detail than needed for general use.
What's the maximum date these timestamps can represent?
With 18 digits, LDAP timestamps can represent dates well beyond the year 30000, making them suitable for any practical application requiring future dates.
How do I handle scientific notation?
Our converter automatically handles both standard integer format and scientific notation (e.g., 1.32539220002262206E+17). Both formats will be correctly converted to human-readable dates.
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