How do you report hours that vary week to week? after 9 years as a sales associate

My hours change every week at my new part-time job and I am afraid of reporting wrongly. I would rather hear the honest version than the polite one. Sometimes my paycheck is late by a week. Do you report when you earned it or when you were paid?

Report honestly and keep your stubs. An honest small error is much easier to fix than a missing report.