Hi, I have received a hard copy of the offer letter and signed the acceptance letter from a company, with an overlapping joining date with my relieving date from my current organization. I have already informed the HR, and she says that will be fine; I could join on the next day. However, I am not sure what will be considered as the joining date for any future references, the one on the offer letter or the day I join. I don't want to have an overlapping joining and relieving date.