noun
contemporary history
Refers to the study or narrative of recent history, typically from the end of World War II to the present, though boundaries vary.
大学で現代史を専攻しています。
I major in contemporary history at university.
この本は戦後の現代史を詳しく説明している。
This book explains postwar contemporary history in detail.
歴史 is the general term for history; 現代史 specifies the contemporary era.
Compound of 現代 (contemporary, modern) and 史 (history).