1940'lar ("bin dokuzyüz kırklı yıllar" da denir) veya 40'lar ("kırklı yıllar" da denir), 1 Ocak 1940'ta başlayan ve 31 Aralık 1949'da sona eren, Gregoryen takviminin içinde bulunan bir onyıl.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/10/1940s_decade_montage.png/320px-1940s_decade_montage.png)
Wikiwand in your browser!
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.