I hope this isn't closed as off-topic.
In most jobs, you get a monthly salary. In months that have more holidays than average, your return-on-work-hours increases. So, if you had to pick a date to start working, it would be in your best interest to start working just before the holidays (barring other considerations).
I wonder if people make this calculations (consciously or unconsciously) - do people start at a new job just before the holidays more than the rest of the year?