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Note: Windows is a registered trademark of Microsoft Corporation in the United States and other countries. The Windows Timestamp Project is an independent publication and is not affiliated with, nor has it been authorized, sponsored, or otherwise approved by Microsoft Corporation.

Welcome to the Windows Timestamp Project!

Nowadays, microsecond resolution time services are more often asked for than ever before. Be it for network logging or fair network event handling, be it for high speed trading or hardware control, the time has come to evaluate the opportunities Windows offers to implement high resolution and high accuracy time functions.

Recent developements allow to synchronize to a cluster of NTP servers at very high precision. Typical remaining local clock offsets are in the range of a few 10 microseconds only. See details described on the "News" page.

Topics:

• Microsecond resolution at sub-microsecond accuracy.
• Microsecond resolution timer functions.
• Sub-microsecond resolution timestamp functions.
• Functional on any Windows with any hardware.
• Access time stamp and timer functions by means of linking a static library (LIB) or accessing a dynamic link library (DLL).
• Sudden discontinuities in time (e.g. leap year/leap second).
• Smooth time transitions (e.g. network time synchronization).
• High accuracy NTP synchronization by means of NTP cluster schemes.
• Medium/long term discontinuities (e.g. thermal drift of oscillators).
• Support of non-blocking I/O for development and debugging.
• Multithreading/Multicore/Multiprocessor capability.

windowstimestamp.com has been set up to broaden the knowledge about these topics and to develop/release software tools to conquer the Windows microsecond range.

A pdf version of "Microsecond Resolution Time Services for Windows" can be downloaded here.

A pdf version of "Part II: Adjustment of System Time" can be downloaded here.

Do not miss all details described on the "News" page.
A pdf version of the News History can be downloaded here.

Latest version:   2019-05-06: Version 3.10 release [Build 0310]

Note: Windows is a registered trademark of Microsoft Corporation in the United States and other countries. The Windows Timestamp Project is an independent publication and is not affiliated with, nor has it been authorized, sponsored, or otherwise approved by Microsoft Corporation.