कृत्वसुच् etc. suffix, time-indicating अधिकरण bears षष्ठी. For example, In पञ्चकृत्वो अह्नो भुङ्क्ते, अह्नो is षष्ठी. षष्ठी is not implied in the absence of कृत्वसुच् or in the absence of time-indicating अधिकरण case - for example, अह्ने शेते (सप्तमी - sleeps in the day).