The Null Device
A tutor at Cardiff University has determined mathematically that the 24th of January (i.e., this coming Monday) is the most depressing day of the year:
The formula for the day of misery reads 1/8W+(D-d) 3/8xTQ MxNA.
Where W is weather, D is debt - minus the money (d) due on January's pay day - and T is the time since Christmas.
Q is the period since the failure to quit a bad habit, M stands for general motivational levels and NA is the need to take action and do something about it.