Dear Reenu John,
the dates from the date preview in a condition in FWZZ are not stored directly in a table - they are recalculated every time you click the 'date preview' button, using function module FIMA_TERMINE_ERSTELLEN.
Along with basic data (start/end of term....), the input for this function module is the condition itself
(->ikond). On DB level, you will find the conditions in tables VZZKOKO (header) and VZZKOPO (conditions).
Hope this helps!
Marie