Debian 11 tzdata and libdatetime-timezone-perl Updates Released

On May 7, 2026, Debian released important updates for tzdata and libdatetime-timezone-perl affecting Debian 11 (bullseye). The tzdata update addresses a significant timezone change in British Columbia, which transitioned to permanent -07 on March 9, 2026, eliminating the fallback to -08 in November. Additionally, the leap second list was updated to prevent expiration by the end of June. The libdatetime-timezone-perl update resolves critical issues in version 1:2.47-1+2026b. Users are strongly advised to upgrade both tzdata and libdatetime-timezone-perl packages to maintain system integrity and avoid potential disruptions.

Key Points: • Debian 11 tzdata update addresses British Columbia's timezone change. • Leap second list updated to prevent expiration issues. • Critical update for libdatetime-timezone-perl released, requiring immediate upgrades.