Change any git commit date

change_commit_date.sh

# STEP 1
# To change non-root commit
git rebase -i f154548^

# Alternatively, to change the root commit
git rebase -i --root

# STEP 2
# edit the commit you want to change by changing the line
pick f154548 This is a commit message
# to
edit f154548 This is a commit message
# and save&exit

# STEP 3
NEW_DATE="Thu Feb 14 19:59:59 2019 -0800" # custom date
# or alternatively
NEW_DATE="$(date)" # current date

GIT_AUTHOR_DATE="$NEW_DATE" GIT_COMMITTER_DATE="$NEW_DATE" git commit --amend --no-edit --date "$NEW_DATE"
git rebase --continue