We live overseas and come back to the UK in June and December as that's the only time I can get off work.
DS will be 17 months in June. We didn't have the christening in June last year as he's adopted so we wanted to wait until it was all finalised. We didn't have it in December as we thought best to wait till June so we can have the food afterwards in the garden, weather permitting. We told everyone we'd have it in June. My sister is one of DS's godparents.
She's booked herself to play in golf tournaments every Sunday in June.
DH will be furious and want to tell her where to stuff it, but I know if I say anything she'll sulk for the next 10 years.