Hi folks, Finally submitted a patch I believe should be close to acceptable. Attached are a test program kludged to build and run under Cygwin, and a shell script to run it, to test against all the unique POSIX fallback rules added as a line at the end of each of the /usr/share/zoneinfo/ files, and the result log from the test run dumping the input and internal tz data structures. -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. [Data in binary units and prefixes, physical quantities in SI.]