FreeBSD issues errata for IANA Time Zone Database updates

Brief written by the FOSSWire AI editor from FreeBSD How we write

October 14, 2026 1 min read 20 reads

Key Takeaway

FreeBSD is updating its zoneinfo files to reflect recent changes in global timezone boundaries and daylight-saving rules.

Summary

The FreeBSD Project has released an errata notice regarding updates to the IANA Time Zone Database. This affects all supported versions of FreeBSD due to changes in historical and future timestamps for various locations. Users must update their systems or run tzsetup(8) to ensure correct local time, which impacts services like cron and syslog.

Technical details of the tzdata update

Affects the zoneinfo module located in /usr/share/zoneinfo.
Requires running tzsetup(8) to update /etc/localtime if the current timezone is affected.
Updates are available via pkg upgrade -r FreeBSD-base, freebsd-update, or manual source patching.
Third-party runtimes like PHP, Ruby, Java, Perl, and Python may require separate updates if they use independent zoneinfo sources.

Why it matters

Incorrect system time can disrupt scheduled tasks (cron) and system logging (syslog) for users in affected regions.

Original reference: www.freebsd.org →