⏱ Grovestreet NTP

ntp.grovestreet.zipCopy

w32tm /config /manualpeerlist:"ntp.grovestreet.zip" /syncfromflags:manual /update
net stop w32time && net start w32time
w32tm /resyncCopy

w32tm /query /status
w32tm /stripchart /computer:ntp.grovestreet.zip /samples:5Copy

macOS GUI Configuration

1. Open System Settings (or System Preferences on older macOS)

2. Go to General → Date & Time

3. Click Set date and time automatically and enter:

ntp.grovestreet.zipCopy

Terminal Commands

One-time sync:

sudo sntp -sS ntp.grovestreet.zipCopy

Permanent configuration:

sudo systemsetup -setnetworktimeserver ntp.grovestreet.zip
sudo systemsetup -setusingnetworktime onCopy

Ubuntu / Debian (systemd-timesyncd)

# Edit configuration
sudo nano /etc/systemd/timesyncd.conf

# Add under [Time]:
[Time]
NTP=ntp.grovestreet.zip

# Restart service
sudo systemctl restart systemd-timesyncd
timedatectl timesync-statusCopy

Using Chrony (Recommended)

# Install chrony
sudo apt install chrony

# Edit config
sudo nano /etc/chrony/chrony.conf

# Add at the top:
server ntp.grovestreet.zip iburst

# Restart
sudo systemctl restart chronyd
chronyc sources -vCopy

RHEL / Fedora / Rocky

sudo dnf install chrony
sudo nano /etc/chrony.conf
# Add: server ntp.grovestreet.zip iburst
sudo systemctl enable --now chronyd
chronyc trackingCopy

Arch Linux

sudo pacman -S chrony
echo "server ntp.grovestreet.zip iburst" | sudo tee -a /etc/chrony.conf
sudo systemctl enable --now chronydCopy

Active Directory Group Policy

Configure via Group Policy Management (gpmc.msc):

Computer Configuration
  → Administrative Templates
    → System
      → Windows Time Service
        → Time Providers
          → Configure Windows NTP Client

Settings:
  NtpServer: ntp.grovestreet.zip,0x9
  Type: NTP
  CrossSiteSyncFlags: 2
  ResolvePeerBackoffMinutes: 15
  ResolvePeerBackoffMaxTimes: 7
  SpecialPollInterval: 3600
  EventLogFlags: 0Copy

PowerShell (Domain Controllers)

# On PDC Emulator
w32tm /config /manualpeerlist:"ntp.grovestreet.zip" /syncfromflags:manual /reliable:yes /update
Restart-Service w32time
w32tm /resync /rediscoverCopy

Note: Only configure the PDC Emulator to sync externally. Other DCs sync from it via the domain hierarchy.

DHCP Option 42 (NTP Servers)

Configure your DHCP server to distribute the NTP server address automatically to all clients.

ISC DHCP Server

# /etc/dhcp/dhcpd.conf
option ntp-servers ntp.grovestreet.zip;Copy

Windows DHCP Server

# PowerShell
Add-DhcpServerv4OptionDefinition -OptionId 42 -Name "NTP Servers" -Type IPv4Address -MultiValued
Set-DhcpServerv4OptionValue -OptionId 42 -Value "178.238.99.189"

# Or via GUI:
# DHCP Manager → Server Options → Configure Options
# → 042 NTP Servers → Add IP addressCopy

pfSense / OPNsense

Services → DHCP Server → [Interface]
  → Other Options → NTP Server 1: 178.238.99.189Copy

Ubiquiti UniFi

Settings → Networks → [Network] → DHCP
  → DHCP NTP Server: 178.238.99.189Copy

Get Server Time via curl

This server responds to curl and other CLI tools with the current GPS-disciplined time directly. No NTP client required — just a terminal.

Quick Start

curl ntp.grovestreet.zipCopy

Returns ISO 8601 UTC timestamp, e.g. 2026-02-08T14:23:45.123Z

Output Formats

Use the ?format= parameter to choose how the time is displayed:

# ISO 8601 (default)
curl ntp.grovestreet.zip
# → 2026-02-08T14:23:45.123Z

# Unix timestamp (seconds since epoch)
curl "ntp.grovestreet.zip?format=unix"
# → 1738938225.123456

# Human-readable
curl "ntp.grovestreet.zip?format=human"
# → Sunday, February 08, 2026 14:23:45.123456 UTC

# Full server card with stats
curl "ntp.grovestreet.zip?format=all"Copy

Timezone Support

Add ?tz= with any IANA timezone name to get localized output. The default is UTC.

# Amsterdam (CET/CEST)
curl "ntp.grovestreet.zip?tz=Europe/Amsterdam"
# → 2026-02-08T15:23:45.123+0100

# New York (EST/EDT)
curl "ntp.grovestreet.zip?tz=America/New_York"
# → 2026-02-08T09:23:45.123-0500

# Tokyo (JST)
curl "ntp.grovestreet.zip?tz=Asia/Tokyo"
# → 2026-02-08T23:23:45.123+0900

# Combine format and timezone
curl "ntp.grovestreet.zip?format=human&tz=Europe/Amsterdam"
# → Sunday, February 08, 2026 15:23:45.123456 Europe/Amsterdam (UTC+01:00)Copy

Discover Timezones

Don't know your timezone identifier? Search for it:

# List all available timezones
curl "ntp.grovestreet.zip?format=tzlist"

# Search for a specific region
curl "ntp.grovestreet.zip?format=tzlist" | grep -i amsterdam
# → Europe/Amsterdam

curl "ntp.grovestreet.zip?format=tzlist" | grep -i "new_york"
# → America/New_YorkCopy

Timezone names follow the IANA Time Zone Database (also known as the Olson database or tz database). Full reference: Wikipedia — List of tz database time zones

Dedicated Endpoint

The /time path works the same way but is always plain text — useful for browser access or scripts that set a custom User-Agent:

# These are equivalent:
curl ntp.grovestreet.zip
curl ntp.grovestreet.zip/time

# Works in browsers too:
# https://ntp.grovestreet.zip/time?format=human&tz=Europe/AmsterdamCopy

Response Headers

Every response includes machine-readable headers for programmatic use:

# Inspect headers with -v or -I
curl -I "ntp.grovestreet.zip?tz=Europe/Amsterdam"

# X-Server-Timestamp: 1738938225.123456  (Unix time, always UTC)
# X-Stratum: 1                           (NTP stratum level)
# X-Timezone: Europe/Amsterdam           (Requested timezone)Copy

Supported CLI Tools

The server automatically detects these tools and responds with plain text instead of the web dashboard:

curl · wget · HTTPie · Python requests · PowerShell · Go http.Client · aiohttp · lwp-request · fetch

If your tool isn't detected, use the /time endpoint directly.