How can I ignore committing timezone information in my commit?

Question

Recently, I forked a repository hosted by github, with contributors spreading all over the world, and found out that the each commit log contains committer\'s timezone infor

Answer 1

Why are committer's timezone needed for commits? What is it used for? Isn't UTC time enough?

The timezone is useful to figure out the local time of the author/committer doing the operation.

According to https://git-scm.com/docs/git-commit-tree#_date_formats:

Git internal format

It is  , where  is
the number of seconds since the UNIX epoch.  is a
positive or negative offset from UTC. For example CET (which is 1 hour
ahead of UTC) is +0100.