---
name: "systemd-time-wait-sync.service"
section: "8"
platform: "linux"
package: "systemd"
version: "262.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/systemd-time-wait-sync.service"
---

# systemd-time-wait-sync.service(8)

Wait until kernel time is synchronized

## NAME

systemd-time-wait-sync.service, systemd-time-wait-sync - Wait until kernel time is synchronized

## SYNOPSIS

systemd-time-wait-sync.service

/usr/lib/systemd/systemd-time-wait-sync

## DESCRIPTION

systemd-time-wait-sync is a system service that delays the start of units that are ordered after time-sync.target (see [**systemd.special**(7)](/systemd.special/7.md) for details) until the system time has been synchronized with an accurate remote reference time source by systemd-timesyncd.service.

systemd-timesyncd.service notifies systemd-time-wait-sync about successful synchronization. systemd-time-wait-sync also tries to detect when the kernel marks the system clock as synchronized, but this detection is not reliable and is intended only as a fallback for compatibility with alternative NTP services that can be used to synchronize time (e.g., ntpd, chronyd).

## FILES

/run/systemd/timesync/synchronized

The presence of this file indicates to this service that the system clock has been synchronized.

Added in version 239.

## SEE ALSO

[**systemd**(1)](/systemd/1.md), [**systemd.special**(7)](/systemd.special/7.md), [**systemd-timesyncd.service**(8)](/systemd-timesyncd.service/8.md)