BIRTH MONTH
December-born babies
真冬生まれ。0-3ヶ月は外出最小限、室温管理が肝。

Age stage timeline
| Age stage | Calendar month | Season | View |
|---|---|---|---|
| Prenatal | 9 | autumn | See this combo → |
| 0-3 months | 12 | winter | See this combo → |
| 4-6 months | 4 | spring | See this combo → |
| 7-9 months | 7 | summer | See this combo → |
| 10-12 months | 10 | autumn | See this combo → |
| 13-18 months | 1 | winter | See this combo → |
| 19-24 months | 7 | summer | See this combo → |