Router Loses Time and Date After Reboot: Causes and Fixes

What the router clock is for

Your router keeps an internal clock for logs, scheduling, security certificates and tasks such as firmware updates. When the clock is wrong, event logs show incorrect times, and features that depend on the clock can behave oddly. The clock is not part of the Wi-Fi signal; it is a small system setting stored separately from the radio configuration.

The clock is also separate from the Wi-Fi radio standards. The IEEE 802.11-2020 standard defines the medium access control and physical layer specifications for wireless LANs, but it does not define router timekeeping. The Wi-Fi Alliance MAC/PHY pages describe Wi-Fi generations such as Wi-Fi 7 and Wi-Fi 6 in terms of throughput and features, not clock behavior. A router can have strong Wi-Fi and still lose its time after reboot.

Why the time and date reset after reboot

A reboot does not normally erase saved settings. If the time and date reset, the most common cause is that the NTP setting was not saved, or the router cannot reach an NTP server after it starts. NTP stands for Network Time Protocol, the usual way a router sets its clock from an internet time server.

Another cause is power loss. When a router is unplugged or the power goes out, it has no source of energy to keep a clock running unless it has a battery or a real-time clock with a small backup cell. Many consumer routers do not preserve the clock during a power interruption, so they start with a default value after power returns.

NTP settings and how to restore them

Start by opening the router admin page and looking for time, date or NTP settings. Choose your time zone and make sure automatic NTP is enabled. Most admin pages have a Save or Apply button; if you leave the page without saving, the setting is lost.

If NTP is already enabled but the clock still resets, check whether the router can reach the internet after reboot. A router that starts with no internet connection cannot fetch the time. You can test this by watching the admin page after a reboot and then rebooting the router.

Some routers let you set the time manually. This can work for a while, but manual time is the first thing lost when power fails. Automatic NTP is usually the better choice. If you need help finding the page, see how to set router time.

Power interruptions and the real-time clock

If the reset happens whenever the power goes out, the issue is likely the lack of a battery-backed clock. When power returns, the router boots with a default date and time. This is not a sign that the router is broken, but it can be annoying if you rely on accurate logs or scheduled reboots.

You can reduce power-related problems by connecting the router to a surge protector or an uninterruptible power supply. The CPSC publishes safety education resources for home and indoor hazards, including fire safety and electrical product topics, which is a useful reminder to inspect power cords and adapters when you change your setup. If you want to make the router less sensitive to interruptions, see how to protect router from power surges.

Router firmware and security

Firmware updates can change how a router stores settings. If the clock problem started after an update, check the router admin page for a new NTP section or default time. Keeping firmware current also matters for security because router vendors fix vulnerabilities in updates. See router firmware updates explained and how to update router firmware.

NIST develops cybersecurity standards, guidelines and best practices for organizations and the public. The same idea applies to your home router: do not ignore settings that look wrong, including the system clock. A wrong clock can break certificate checks and make logs useless, so it is worth fixing. For broader protection, review router security basics. For smaller networks, NIST also publishes a Small Business Cybersecurity Corner with practical resources.

Wireless security standards also matter. The Wi-Fi Alliance requires WPA3 and Protected Management Frames on new certified devices, which is a reminder to keep the router's security settings intact while you troubleshoot the clock.

What this means for repair

Losing time after reboot is usually a configuration problem, not a hardware failure. Try saving NTP settings, updating firmware and testing another reboot before deciding the router is faulty. If the clock still resets on every reboot even with NTP set, the router may have a failing memory or clock circuit.

In that case, you can live with the issue, set the time after each reboot, or replace the router. Since a router with a failing clock may also lose other settings, check whether the router returns to factory defaults as well. If it does, see router keeps resetting to factory defaults.

If you choose to repair, ask the router maker about service options. Most consumer routers are not designed for component-level repair, and a persistent clock failure often points toward replacement. For a buying decision, see router repair vs replace.

When to consider a different router

You do not need a new router just because the clock resets after a power outage. But if the router has other signs of aging, such as random restarts or poor Wi-Fi performance, a replacement can be the practical move. See router randomly restarts.

For most homes, a current best Wi-Fi 6 routers or best mesh routers will include straightforward time settings and good overall performance. Travelers who reboot often may prefer a best travel routers model with simple NTP defaults.

What to pick for your use

Questions

Is it normal for a router to lose time after a power outage?

Yes, unless the router has a battery or backup cell for the clock. Many consumer routers do not keep time during a complete power loss, so they boot with a default date and time after power returns.

Can a router lose time if NTP is enabled?

It can if the router cannot reach the NTP server after boot, if the time zone is wrong, or if the NTP setting was not saved. The router must have an internet connection and a valid NTP server address.

Do I need to replace a router that loses time?

Usually not. Try enabling NTP, setting the time zone, saving the settings and updating the firmware first. If the clock still resets every time and the router also loses other settings, the hardware may be failing.

Why does the wrong clock matter for security?

Security certificates and encrypted connections rely on valid time. Logs also use the clock to record when events happened. A wrong clock can make it harder to diagnose issues and can cause certificate checks to fail.