I want to know the answer to the following question:
What format is used to store internal time in systems that use zoneinfo?
All the background I'm provided with is that "In many of those systems there is also a system-wide setting that is applied if the TZ environment variable isn't set: this setting is controlled by the contents of the /etc/localtime file, which is usually a symbolic link or hard link to one of the zoneinfo files.". Is that enough to answer the question?