関連ワード:  get first day of current month python    get last day of current month python    get first and last day of current month python    get first day of month python    python datetime get first day of current month    get first day of next month python    get first day of last month python    get last day of month python    get last day of month python datetime    python datetime get last day of current month  
結果 : get first day of current month python