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Comment by Jabbles | Hacker News Reader

Something about the way git works suggests to me that Google did not in fact just change the timestamp on the first commit in their repository.

Force push works just fine for changing timestamps.

Something tells me your model of how git works is completely incorrect.

Step 1: change system clock

Step 2: make a commit

Step 3: rebase later commits to that commit

Step 4: force push to the main branch

Step 5: correct system clock

Try it. It works.

I can save you some time:

    git commit --date "Tue Jul 18 19:05:45 1972 -0500"

That format actually works just fine for --date.

There's also the GIT_AUTHOR_DATE and GIT_COMMITTER_DATE environment variables.

TIL. I've never needed this, but it could come in handy in the past.

Thanks.