The only time there's a time limit in the BG series is when that time limit is
specifically stated. If a character says, "You have 3 days to return this item to me," or "We've got to get there in the next 8 hours," they
mean it. If no specific time limit is given, there isn't one, no matter what might be happening: If somebody's house is burning down, it will still be burning down a month from now.
See
The Grand List of RPG Cliches, Rule 186.