{"action":"closed","issue":{"url":"https://api.github.com/repos/pydata/pandas/issues/10809","labels_url":"https://api.github.com/repos/pydata/pandas/issues/10809/labels{/name}","comments_url":"https://api.github.com/repos/pydata/pandas/issues/10809/comments","events_url":"https://api.github.com/repos/pydata/pandas/issues/10809/events","html_url":"https://github.com/pydata/pandas/issues/10809","id":100633389,"number":10809,"title":"unwanted cast of string to datetime","user":{"login":"levicivita","id":13771893,"avatar_url":"https://avatars.githubusercontent.com/u/13771893?v=3","gravatar_id":"","url":"https://api.github.com/users/levicivita","html_url":"https://github.com/levicivita","followers_url":"https://api.github.com/users/levicivita/followers","following_url":"https://api.github.com/users/levicivita/following{/other_user}","gists_url":"https://api.github.com/users/levicivita/gists{/gist_id}","starred_url":"https://api.github.com/users/levicivita/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/levicivita/subscriptions","organizations_url":"https://api.github.com/users/levicivita/orgs","repos_url":"https://api.github.com/users/levicivita/repos","events_url":"https://api.github.com/users/levicivita/events{/privacy}","received_events_url":"https://api.github.com/users/levicivita/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/pydata/pandas/labels/Timeseries","name":"Timeseries","color":"AFEEEE"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-08-12T20:56:15Z","updated_at":"2015-08-12T22:23:06Z","closed_at":"2015-08-12T22:23:06Z","body":"Note how the string 'M15' becomes somehow 8/15/2015!\r\n\r\n>>> pandas.Series([datetime.datetime(2015,1,1), 'M15'])\r\n0   2015-01-01\r\n1   2015-08-15\r\ndtype: datetime64[ns]\r\n\r\nCompare other arbitrary strings that are left alone:\r\n\r\n>>> pandas.Series([datetime.datetime(2015,1,1), 'MM15'])\r\n0    2015-01-01 00:00:00\r\n1                   MM15\r\ndtype: object\r\n\r\n\r\n"}}