A: 24/12 Business Traveller (open 01/12)

Soozybee

https://www.businesstraveller.com/competitions/business-traveller-advent-calendar-day-19-win-a-mens-avi-8-charcoal-green-hawker-hunter-chronograph-watch/

Day 19: Win a men's AVI-8 Charcoal Green Hawker Hunter Chronograph Watch

Idol_Eyes

https://www.businesstraveller.com/competitions/business-traveller-advent-calendar-day-20-win-a-bespoke-mini-memoir-life-story-book-worth-995/

Business Traveller Advent Calendar Day 20: Win your own life story book

hertzyabazas

Day 21: Win a £200 voucher to spend at caseluggage.com

https://www.businesstraveller.com/competitions/business-traveller-advent-calendar-day-21-win-a-200-voucher-to-spend-at-caseluggage-com/

Idol_Eyes

https://www.businesstraveller.com/competitions/business-traveller-advent-calendar-day-22-win-a-three-year-subscription-to-the-print-edition-of-business-traveller-uk/

Business Traveller Advent Calendar Day 22: Win a three-year subscription to the print edition of Business Traveller UK

Soozybee

https://www.businesstraveller.com/competitions/business-traveller-advent-calendar-day-23-win-a-relaxing-spa-staycation-for-two-at-oulton-hall-hotel-spa-and-golf-resort/

Advent Calendar Day 23: Win a relaxing spa staycation for two at Oulton Hall Hotel, Spa and Golf Resort

Idol_Eyes

https://www.businesstraveller.com/competitions/business-traveller-advent-calendar-day-21-win-a-seven-day-all-inclusive-stay-at-mitsis-rinela-beach-resort-spa/

Business Traveller Advent Calendar Day 24: Win a seven-day all-inclusive stay at Mitsis Rinela Beach Resort & Spa

Resort is in Crete, can't see whether flights are included are not but assume not.