Lodging company studies show that when Christmas falls on or near a weekend, Dec. 23-26, check-ins at Western ski resorts are usually sold out months in advance. But with the holiday falling on a Tuesday this year, availabilities (based upon advance reservations) don't start getting tight until Dec. 27 or 28, according to Bobby Foster, director of marketing for Park City, Utah-based Premier Resorts (premier-resorts.com). "This means we have availabilities for the Dec. 23-26 period that we don't normally have and many lodges are relaxing their 7-night minimum requirements to accommodate those who just want to visit for a few days over Christmas," said Foster.