Hopefully none! If you were never late, that is great! Simply share that you were always punctual. If you were late due to circumstances beyond your control, that is okay too! Simply share that you always try to leave a few extra minutes early to ensure you have enough time to get to work, but there was a day when something out of the ordinary happened (flat tire, traffic was at a standstill on the interstate, etc...). Then, share what steps you took to ensure you got to work as quickly as possible! Finally, if you were frequently late to work, it is essential to share this as it may come up in a reference check. Be sure to explain why you were late as well as what steps you have taken to ensure you can commit to being on time every day in a new position.