Tz binary file

In such a case, it may be worth the effort to save the output that "format-hex" produces as a text file, so that you can use a normal plain text editor like Notepad to view it. This produces a file called "file. You can of course name the file anything you want. Both "file. Then open "file.

This allows you to page up and down through the output as much as you like. Windows 7, 8, 8. Such a text file can then be viewed in any plain text editor , including Notepad, which comes with Windows.

Click the Start menu and type "cmd". The words "Command Prompt" should appear at the top. This opens a command prompt window. The exact words will be different on your computer, since you are unlikely to have the same Windows account name as me. If you want to return to the default directory you were in when you first opened Command Prompt, type:. To view the contents of say "file. Actually, you can name the temporary text file anything you want. Just don't give it the same name as an existing file, or certutil will blithely overwrite that file with its output.

If any of your filenames contain spaces, encose them in quotation marks, like this:. The program "certutil" will then proceed to create the output file. When it's done, you will be deposited back at the command line.

Now open that file in Notepad or another plain text editor. You can do this either by starting notepad the usual way eg, typing "Notepad" into the Start menu and clicking the "Notepad" line that appears , then navigating to the location of "file. It is updated periodically to reflect changes made by political bodies to time zone boundaries and daylight saving rules. Each main entry in the database represents a timezone for a set of civil-time clocks that have all agreed since Timezones are typically identified by continent or ocean and then by the name of the largest city within the region containing the clocks.

The database also records when daylight saving time was in use, along with some time zone abbreviations such as EST for Eastern Standard Time in the US.

Alternatively, the following shell commands download the same release in a single-tarball format containing extra data useful for regression testing:. Older releases are in files named tzcode V.

Since , each version has been a four-digit year followed by lower-case letter a through z , then za through zz , then zza through zzz , and so on. Since version g, each release has been distributed in POSIX ustar interchange format , compressed as described above; older releases use a nearly-compatible format. Since version h, each release has contained a text file named " version " whose first and currently only line is the version. Older releases are archived , and are also available in an FTP directory via a less-secure protocol.

Alternatively, a development repository of code and data can be retrieved from GitHub via the shell command:. When I was googling around for an intro article about it there were almost none, so decided to write one on my own.

Here are the official documentaion and the source code on GitHub. When you install tzdata , several related CLI tools are included in the package. As captured in the comment , California voted to start the Daylight Savings day from the last Sunday in April from However, the federal government passed the bill to extend the Daylight Savings Time to start from the second Sunday of March in Therefore you see that April 1st was not in Daylight Savings Time back in above.

Policy changes like this happened throughout the world, and tz database documents these events in the source file.