Deadline Getting Closer - Still Stuck In Table Design Phase

Thanks to all who have provided help on other threads. I have made some progress but I am still struggling with the last couple of relationships here. I am tracking projects and have normalized this data into the following tables:

tbl_customers (contains customer specific information)


Is on the "one" side of a 1:many relationship to tbl_workorders. (1 customer for multiple WO's)
Is on the "one" side of a 1:many relationship to tbl_locations (up to 2 locations per customer).
Is on the "one" side of a 1:many relationship to tbl_circuits (up to x number of circuit ID's for each customer)


tbl_workorders (contains order specific information)


Is on the "one" side of a 1:many relationship to tbl_costs (multiple costs for each WO).
Is on the "one" side of a 1:1 relationship to tbl_services (each WO can only have one row on the services table. I suppose I could combine all fields onto 1 table, but logically they represent different information. The WO table is about the work order and the other table deals with the customer's services.)
Is on the "one" side of a 1:many relationship to tbl_contacts (can be multiple internal contacts for each WO)



tbl_dates (contains as many as 33 possible dates for each project)

This table is one that I am having trouble with. Each work order can have any of the possible dates on tbl_dates. I have designed tbl_dates to be as normalized as possible. You select a date type and enter the date. I can't figure out where to relate this to tbl_workorders without using the WO field. Perhaps I am designing this table incorrectly.

Any help is appreciated. Thanks!