Thanks Jed, that's great stuff. For anyone else who wants to see this directly you can compare the two dates side by side with git log --pretty=format:"%cd -

Thanks Jed, that's great stuff. For anyone else who wants to see this directly you can compare the two dates side by side with git log --pretty=format:"%cd - %ad" Where %cd is committer date and %ad is author date. %cd is the value that resolves the op's bisect problem.