How to Change the Time on Your Laptop (Windows & macOS)

Getting the time wrong on a laptop seems minor — until it causes syncing failures, authentication errors, or just makes your calendar unreliable. Whether your clock drifted after a long flight, a battery replacement, or a system update, adjusting it is straightforward. What varies is how you get there depending on your operating system, your settings, and whether automatic time sync is doing its job.

Why Laptop Clocks Go Wrong in the First Place

Your laptop keeps time using two systems working together: the CMOS battery (a small coin cell on the motherboard that maintains the hardware clock when the laptop is off) and internet time synchronization via NTP (Network Time Protocol). When you're online, your OS regularly checks an NTP server and corrects any drift automatically.

Problems appear when:

• The CMOS battery is aging or dead
• Your laptop has been offline for an extended period
• Automatic time sync is disabled
• A timezone setting is incorrect after travel
• A recent OS update reset your regional settings

Understanding which of these applies to you changes whether a quick manual fix solves the problem or whether something deeper needs attention.

How to Change the Time on Windows ⏱️

Windows 11 and Windows 10

1. Right-click the clock in the bottom-right taskbar
2. Select Adjust date and time
3. In the Settings panel that opens, you'll see a toggle for Set time automatically

If automatic sync is on and your time is still wrong, the most likely culprits are an incorrect timezone setting or a temporarily unreachable time server. Check the Time zone dropdown first — this is the most common cause of clock errors after travel.

To set the time manually:

• Toggle Set time automatically to Off
• Click Change under "Set the date and time manually"
• Enter the correct date and time, then confirm

To force a sync with the internet time server:

• Scroll to Additional settings (Windows 11) or Sync your clock (Windows 10)
• Click Sync now

Changing the Time Server on Windows

If syncing repeatedly fails, you can switch the NTP server:

1. Open Control Panel → Date and Time → Internet Time tab → Change settings
2. Replace the default server (usually time.windows.com) with an alternative like pool.ntp.org
3. Click Update now

This is useful if your network blocks the default Microsoft time server.

How to Change the Time on macOS 🍎

macOS Ventura, Sonoma, and Later

1. Open System Settings (not System Preferences, which was retired in macOS Ventura)
2. Navigate to General → Date & Time
3. You'll find a toggle for Set time and date automatically

If you want to set the time manually, turn that toggle off. You can then click the date or time fields directly to edit them.

For timezone: scroll to the Time Zone section. If Set time zone automatically using current location is enabled, macOS uses your location services to determine the correct zone. Disabling this lets you select a region and city manually.

To change the NTP server on macOS, unlock the settings with your admin password and replace the default Apple time server (time.apple.com) with your preferred server.

macOS on Older Systems (Big Sur, Catalina)

The path is slightly different: System Preferences → Date & Time. The options are functionally identical, just presented in the older preference pane interface. You'll need to click the padlock icon at the bottom-left to make changes.

Quick Comparison: Windows vs. macOS Time Settings

When the Fix Doesn't Stick

If your time keeps resetting after every restart, that's a different problem from a misconfigured setting. A failing CMOS battery is the usual suspect on older laptops. This small battery (typically a CR2032 on desktops, soldered or slotted on laptops) holds the hardware clock between power cycles. When it dies, the system loses time every time it's fully powered off.

Signs of a failing CMOS battery:

• Clock resets to a date in the past (often January 1, 2000 or similar)
• BIOS settings reset on reboot
• Warnings during startup about system time

On most laptops, replacing it requires partial disassembly — the difficulty varies significantly by model and manufacturer design.

The Timezone Variable Most People Overlook

A clock showing the wrong time isn't always a sync failure — sometimes it's a timezone mismatch. This happens most often after:

• Traveling across timezones with automatic location disabled
• Cloning a drive or restoring from a backup
• Dual-booting Windows and Linux (which handle hardware clock differently — Linux defaults to UTC, Windows defaults to local time, which can cause them to conflict)

If the time is consistently off by a whole-hour increment, check the timezone before assuming anything else is broken.

What Actually Determines Whether This Is a Quick Fix

Most time-change issues resolve in under two minutes. But the actual effort depends on factors specific to your setup: whether you have admin rights on the machine, whether you're on a managed network that controls time settings, how old the hardware is, and whether you're dealing with a software misconfiguration or a hardware problem like a depleted CMOS battery.

Someone on a personal Windows laptop connected to Wi-Fi will have a completely different experience than someone on a corporate-managed MacBook where IT policies control time sync settings. The steps above cover the standard cases — but which ones apply, and whether a simple sync or manual adjustment will hold, comes down to your own machine's situation.