Good Day

I currently busying trying setup Workflow with Flexi Task and reminder email only need to start sending after lookup of Date&Time field.

Example:

Got "Project date" field type is "Date & Time" when they created new item and the user will selected date end and workflow start assigned the user Flexi Task but only require user to action after xx days base on the "Project Date" meaning if i select 4 April date end  and it was created on the 1st April then reminder only happened after 4 of April .

I understand Flexi task reminder come in interval but can we delay or only send the reminder after that date?