Change rent collection date

Current rent is due on the 23rd of each month but the tenant has requested to change this to 29th of the month. Currently have OpenRent rent collection in place. Any thoughts regarding this? Is it a straight forward process? Would it be best to leave it at the current date of 23rd? This is a new tenancy - been in place for the last month.

If you decide to accommodate their request they would need to pay 6 days rent from 23 - 28th and then start paying monthly from 29th.