| Created |
| Associated with 二倍年 |
| Associated with 4倍年暦 |
| Associated with 4倍年暦説 |
| Associated with 2倍年暦 |
| Associated with 二倍年暦 |
| Associated with 半年暦 |
| Associated with 二倍年歴 |
| Associated with 二倍年暦説 |
| Associated with 春秋年暦 |
| Associated with 春秋二倍年暦 |
| Associated with 一年二歳暦 |
| Associated with 半年一年の数え方 |
| Associated with 半年一年の紀年 |
| Associated with 倍年歴 |