(often referred to as NISTIME) is a lightweight, official utility provided by NIST. Its primary purpose is to connect your computer to NIST’s atomic clock servers via the Internet, ensuring your local system time is accurate within milliseconds of Coordinated Universal Time (UTC).
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You can set the program to run periodically or simply use it as a manual check when you suspect your CMOS battery is failing or your system clock is drifting. Conclusion (often referred to as NISTIME) is a lightweight,