History

Time	Change
2021-01-17 07:37:10+00:00	Created
2021-01-17 07:37:10+00:00	Associated with 4文字元号名の省略形
2021-01-17 07:37:10+00:00	Associated with 4文字元号の省略形
2023-05-14 04:29:39+00:00	Associated with 元号略号