Atomic Clock Sync

Atomic Clock Sync: Accurate Desktop Time Synchronization

Free desktop utility for precise timekeeping, running in the system tray and periodically checking online atomic clock servers for calibration

What is Atomic Clock Sync?

Atomic Clock Sync is a free desktop utility program for Windows that synchronizes your computer's system clock with Internet atomic clock time servers. This allows your computer's internal clock to maintain accuracy for precise timekeeping.

Atomic Clock Sync runs as a lightweight application in the Windows system tray. It periodically checks time from online sources that connect to official atomic clocks, such as the National Institute of Standards and Technology (NIST) Internet Time Service. It then uses this reference time to gently calibrate the time and date settings on your local Windows computer.

Keeping accurate time on your computer's internal clock is useful for scheduling tasks and events properly in Windows. It also helps ensure consistency with time-sensitive operations, like financial transactions and astronomical calculations. Since a computer's CMOS clock tends to drift over time, Atomic Clock Sync provides automated minor adjustments, so you don't have to manually sync the time yourself.

As an unofficial adjunct time server, Atomic Clock Sync can help maintain precise clock accuracy within your network or home. It offers customizable options for adjustment interval, time correction limits, and NTP server selection. The program also logs status messages for diagnostics.

Atomic Clock Sync Features

Official Links