here were my shell aliases:
```
shellAliases = {
git-today = ''
env GIT_AUTHOR_DATE="`date -I`T00:00:00" env GIT_COMMITTER_DATE="`date -I`T00:00:00" git'';
git-month = ''
env GIT_AUTHOR_DATE="`date +%Y-%m-01`T00:00:00" env GIT_COMMITTER_DATE="`date +%Y-%m-01`T00:00:00" git'';
git-last-month = ''
env GIT_AUTHOR_DATE="`date +%Y-%m-01 -d '-1month'`T00:00:00" env GIT_COMMITTER_DATE="`date +%Y-%m-01 -d '-1month'`T00:00:00" git'';
};
```