Sorry about the lack of detail in the previous post, lemme see if I can clarify some things. Appreciate the responses though!
The players managed to take over the monastery and they're about to explore the outer portions of Kelmarane, the areas outside of the battle market and the ruined church. The adventure hints that it should take more than one day to explore, as it describes the various things that happen on each day. How long do you think it should take to explore a ruined structure in the Ruins of Kelmarane.
Assuming we're just talking about the generic ruins (as opposed to the named sites), then just a couple of minutes per building for a basic walkthrough. The ruins are broken shells, for the most part. It's the sort of thing I would (did) handwave along the lines of "you spend an hour going door to door, searching the ruins, until [next interesting thing happens]."