Upgrade timezone data to tzdb-2024a (Released 2024-02-01) from IANA
The last update of the timezone data of OpenACS happened on Sep 29, 2015 in the release process of OpenACS 5.9.0. The new timezone data is based on the newest released data from IANA reflecting the changes made by political bodies to time zone boundaries, UTC offsets, and daylight-saving rules. The procedures to update the database are described in RFC 6557 (https://www.rfc-editor.org/rfc/rfc6557.html) and contains data for e.g. Europe up to the year 2499.