Within the context of a critical discourse historiographical (CDH) approach to critical discourse studies (CDS), this article applies a range of theories to the Hong Kong Umbrella Movement, or Hong Kong Occupy Movement, to understand it as a discursive event. The CDH approach argues that a diachronic, historiographical approach can contribute to historiography, the writing of history, in that it can create first readings and interpretations of important events. The approach focuses on critical moments in discourse, of which the Hong Kong Umbrella Movement is considered an important one in the context of Hong Kong’s ongoing socio-historical development. Four theories are applied, in addition to the historical analysis, to further interpret the Hong Kong Umbrella Movement phenomenon: social movement theory, performance theory, identity theory and social action as text theory. It is concluded that the CDH approach to CDS and findings of the study may be useful in the consideration of other social movements and Occupy movements globally. [ABSTRACT FROM AUTHOR]