In this text, the author prefers Monday to be considered the first day of the week because it translates to "day one" in their native language, Cantonese. The author shares a step-by-step guide on how to change the first day of the week in Asana by accessing the My Settings window and selecting the desired day from the dropdown menu. Additionally, the text mentions that if the user's calendar starts on the "right" day of the week doesn't spark joy, they can consider enabling celebration creatures, but this is not directly related to changing the first day of the week in Asana.