Debian Security Advisory

DLA-3366-1 tzdata -- LTS security update

Date Reported:
24 Mar 2023
Affected Packages:
Security database references:
No other external database security references currently available.
More information:

This update includes the changes in tzdata 2023b. Notable changes are:

- Egypt uses DST again, starting on April. - Palestine and Lebanon delay the start of DST this year. - Morocco DST will happen a week earlier on April 23. - Adjustments to Greenland's timezones and DST rules.

For Debian 10 buster, this problem has been fixed in version 2021a-0+deb10u10.

We recommend that you upgrade your tzdata packages.

For the detailed security status of tzdata please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: