Not sure what you mean. There is always a time frame that the offer is good for. Usually toward the bottom. There is a lot of info on one page but once you get used to it, it is easy to find the info that you are looking for. Good Luck.
As the above poster mentioned, the auction details will mention for what time periods the auction is valid, and any blackout dates. If your desired date of travel fits within those guidelines, you can call or email the hotel/property before placing a bid, to enquire if they have space available for your dates.
Then, right after winning the acution, you contact the hotel again to confirm and book your reservation.
I think I understand the question because I too am new and was wondering the same thing. For example if a villa is up for auction for a year, how do we know when it's actually available. And I am sorry if this information is posted somewhere else but I was also wondering if I bid on a villa and it wasn't available on the dates I wanted am I stuck with the auction win or can I decline it?
This is what I do, too. Ideally, it's great to have some flexibility in your travel dates when bidding. But if my flexibility is limited, or I think it's a "high demand" property, I'll check availability first before bidding. It's still not an absolute guarantee...the property could fill up between when you check and when you win an auction and try to make a reservation, but it will give you a general idea. I haven't had a problem yet.
It's also possible to search for auctions by month of travel on the main LL site -- that way you could narrow down the auctions to those which are at least available within your time frame before contacting the properties. When I'm teaching at the university I'll use this feature to search for places available between terms (fortunately, Oxford terms are short!)
I have found that the hotels or resorts are usually very accommodating. I always call them before I bid. Once I know the date I need is available, I ask would they please hold the accommodation for 24 hours. That way I have time to bid, then call back to confirm the date. Many times this system works out very well.