Depends on the mindset and schedule of the person, left for me i spent the festive period with my extended family mostly so i didn't get much time to follow up my favourite sports which is football, i didn't even have a chance to bet on my favourite team Chelsea cause i was often in the kitchen helping to make meals for the family, however their are people who are opportuned during that period to relax while watching football and betting on their favourite teams.
Some people were saying that they do not gamble because they want to enjoy holidays etc makes me wonder if people treat gambling as a job and they want to take a break once we are in a holiday season. 
Since gambling is for enjoyment, I prefer to gamble during the holidays too because there is no other tension or work and gambling in an online casino is a fun activity. Yes, I don't bet during those days as it is hard to follow the matches due to engagement with families and friends but casino games are best enjoyed during those times.
For me, going on vacation is time to rest the mind and mood, release all the burdens and various problems that exist, so don't mess it up with silliness, if you want to enjoy vacation by gambling the right time is at home with the peace that we can get.