| Created |
| Associated with 法定紀年法 |
| Associated with 法定暦法 |
| Associated with 外国からの公文書における年の表示方法 |
| Associated with 法定暦 |
| Associated with 外国政府への改暦通知 |
| Associated with 公用暦 |
| Associated with 改暦通知 |
| Associated with 公用紀年 |
| Associated with 公用紀年法 |
| Associated with 公的紀年法 |
| Associated with 公年号 |
| Associated with 公用年号 |
| Associated with 公用年號 |
| Associated with 公年號 |