Change the section on the Extras tab on the giving form in OLX that reads "Do you want to allow pledge gifts?" to give the organization the option to choose between giving the donor the ability to choose their own date to pay on a monthly, quarterly or annual basis or putting in a date of that organization's choice, as it currently is set up.
By adding this option, it gives the donor, that may not want to send their gift or have their gift processed on January 1, the opportunity to choose a date that fits their specific circumstances, making it more likely for them to give.