Possible Clues:

• Stayed around about mid-January for 24 hours
• 'There are days when spelling - simply doesn't count' (A. A. Milne)
• After this one weds shortly
• Period when trade unions, having contracted, expand again
• See 4
• One always weds afterwards
• 24 hour stay due to be changed
• Time divers used to dip into northern river
• Part of week (for pancakes?)
• When Grundy was christened, forty eight hours before Chesterton's man