I have noticed that most (if not all) companies that offer holidays in Bulgaria fly out on Saturdays and just wondered whether they would be doing the same next year.
The reason I ask is that Saturday to Saturday would be Christmas Day flying out and New Years Day flying home - not much fun spending Xmas day travelling also this would only give the operators one premium week rather than the usual 2.
Both Crystal and Thompson are doing Sunday to Sunday until 8th January - you would fly Boxing Day and return 2nd Jan if you booked with them. The week commencing 2nd Jan is only a 6 night holiday returning Saturday 8th