The correct timezone affects more than the clock on your screen. It drives cron job scheduling, systemd timer execution, log file timestamps, database record timing, and SSL certificate validity checks. A mismatched timezone can cause scheduled jobs to fire at the wrong hour and make log timestamps impossible to match with real-world events. This guide shows how to change timezone on Ubuntu using the timedatectl command (the recommended approach for servers and remote machines) and through the graphical Date & Time settings on desktop systems. The steps apply to all current Ubuntu releases including 24.04 and 26.04. Check the Current Timezone Before You Change It Run timedatectl with no arguments to see the active timezone and clock status: Sample output: A few fields worth understanding: The timezone is implemented as a symlink. Confirm the active timezone by checking where /etc/localtime points: The final component after /usr/share/zoneinfo/ shows the current timezone name. Change Timezone on Ubuntu Using timedatectl First, identify the exact name of your target timezone. Ubuntu uses a Region/City format, not UTC+N offsets. Region/City names are preferred because they automatically account for Daylight Saving Time transitions — a fixed offset like UTC+5:30 becomes wrong when clocks change. List all available timezones: Narrow the output with grep to search by region or city: Timezone names are case-sensitive. Copy the name exactly as shown in the output. Apply the new timezone: Verify the change: The Time zone line now shows the new zone and its current offset. The change takes effect immediately and persists across reboots. Unlike a manual symlink change, timedatectl updates both /etc/localtime and /etc/timezone — the second file is required by legacy tools and some older applications that do not read from /etc/localtime directly. Change the Timezone in Ubuntu Desktop Using the GUI Open Settings from the top-right system menu and select System, then Date &...

Ubuntu 26.04 LTS “Resolute Raccoon” arrived on April 23, 2026 with Linux kernel 7.0, GNOME 50, Python 3.14, PHP 8.5, Java 25, TPM-backed full-disk encryption, post-quantum cryptography in OpenSSL, and a Wayland-only GNOME session. You can upgrade to Ubuntu 26.04 directly...

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