This book is an original work that explores the universe of time elements in WTO Law and tracks their existence and formation. It addresses three fundamental questions: (1) how these time elements can be identified in legal texts; (2) how they may be associated with legal events; and (3) how they may be changed in practice. Taken together, this book offers a systematic reflection on the role of time in WTO Law and sheds new light on the broader theory of legalization within its four‐dimensional framework.