Back 40er ALS Anyos 40 AN عقد 40 Arabic عوام 40 ARY عقد 40 ARZ Década del 40 AST 40-an BAN 40-я BE 40-я BE-X-OLD ৪০-এর দশক Bengali/Bangla
| Millennium: | 1st millennium |
| Centuries: | 1st century BC – 1st century – 2nd century |
| Decades: | 10s 20s 30s – 40s – 50s 60s 70s |
| Years: | 40 41 42 43 44 45 46 47 48 49 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |