No Interruptions Day is Dec 31st. If you choose (or have no choice) but to work one day, this is a great one to get a LOT of work done. Many people will be on holiday and many people who are at work will be doing as little as possible.
Here’s a good chance to buck the trend and crank out a lot while no one else is bothering you with meetings, questions or silly errands to run. Step into the traces and pull the plow, then when the day is done, go out and really let off some steam, knowing that you got more done than almost everyone around you!