How to parse a week number as date ?

[fbeck_br]

I have issues with 2 fields i need to compare. 1. End date (type: date) eg: 2014/08/30 2. Shipment Week (type: select list) eg: W01, W02, etc Now i need to filter all issues where Interval between end date and shipment week is less than 2 weeks. Eg: issueFunction datecompare("", week < date (2w)) How can i convert the string W30 to a date , so i can compare? Or should be possible to use another field type for week, instead of select list? Tks

[Steven F Behnke]

Huh. So to be clear, what does this Shipment Week field represent? A week out of the year?