This is absolutely true and is my once a year habit.
I have 2 children, their birthdays are within 3 weeks of each other – the middle of December and beginning of January.
When I get back from Cheltenham, my wife has missed me sooooooo much! Just count back 9 months from December and you got it.
However, I lost this year so I think it may turn biennial as punishment!
Christmas could be busy this year!