The period between Christmas and New Year's Eve has to be the least productive week of the year, since many people go in to work and sit there like a holiday husk even though their minds are a million miles away.
It actually seems fairly pointless to make people work during that week, so employers should take note of this Unearthed comic by Sara Zimmerman and dedicate the last week of work to watching cat videos!
-Via Geeks Are Sexy