All source files are clearly marked at the top as to the license that applies to them. The original Sol version 1.2.3 sources are licensed under a BSD 3-clause style license. Many files in the Sol project continue to use this license INCLUDING the raw database dump (i.e. the database_values.txt and database_make_sql files) and ALL the image files (including the .psd files). The original Sol version 1.2.3 source release license can be found in the file OLDLICENSE.txt. When Dan released the Sol version 1.2.3 source code, he referred to the license as an MIT license and in fact the original README file included with the Sol version 1.2.3 source code release says the code is licensed under the MIT license which can be found in the LICENSE file (included here as the OLDLICENSE.txt file). However, the license text from that file actually matches the text of the modified BSD (aka 3-clause BSD) license, not the MIT license. See http://www.gnu.org/licenses/license-list.html#ModifiedBSD for comparison. The new source code files that were added to create, read and write the special compact-format database now included in the Sol widget are licensed under the GPLv3. Since these code files are built into the TimeZoneHelper and that is an essential part of the Sol.wdgt combined work, the resulting Sol.wdgt falls under the GPLv3 license. The GPLv3 license can be found in the file COPYING.txt.