History

Time	Change
2021-03-13 09:57:37+00:00	Created
2021-03-13 09:57:37+00:00	Associated with RFC 1357
2021-03-13 09:57:37+00:00	Associated with RFC 1807
2021-03-13 09:58:09+00:00	Associated with RFC 1357の日時形式