December 31st is, for those unlucky enough to not be on holiday, the last working day of the year. Thankfully, things tend to be quiet at the office between Christmas and New Year, and No Interruptions Day capitalises on this to encourage some productivity by getting people to ignore chatty co-workers, turn off their inboxes, unplug their phones and get some work done.
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All details taken directly from provider content at http://www.daysoftheyear.com/days/no-interruptions-day/