SyncTimeByNTP

Random NTP Sync for Windows

Randomly selects a public NTP server and synchronizes Windows Time Service (w32time).

Features

• Randomly selects one of the following public NTP servers:

  • time.stdtime.gov.tw (Taiwan National Standard Time)
  • time.google.com
  • time.cloudflare.com

• Starts the Windows Time service if necessary.

• Updates the configured NTP server.

• Forces an immediate time synchronization.

• Displays the current synchronization status.

Why Random Selection?

Measuring the "fastest" NTP server sounds nice in theory, but many public NTP servers either:

• Block ICMP (ping)
• Ignore custom UDP NTP probes
• Behave differently depending on network conditions

In practice, randomly selecting from several reliable public servers provides a simple and dependable solution without adding unnecessary complexity.

Requirements

• Windows 10 / Windows 11
• PowerShell 5.1 or PowerShell 7
• Administrator privileges

Usage

Run the script as Administrator:

.\RandomNtpAndSync.ps1

Or configure it to run automatically using Windows Task Scheduler.

Recommended settings:

• Trigger: At startup or At logon
• Run with highest privileges

flowchart LR
    Start --> Random
    Random -->|Taiwan| TW[time.stdtime.gov.tw]
    Random -->|Google| GO[time.google.com]
    Random -->|Cloudflare| CF[time.cloudflare.com]
    TW --> Sync
    GO --> Sync
    CF --> Sync
    Sync --> Finish

Loading

Example Output

Selected NTP: time.cloudflare.com

The command completed successfully.

Sending resync command to local computer...
The command completed successfully.

Source: time.cloudflare.com,0x8
Last Successful Sync Time: 2026-06-25 20:38:42

License

MIT License