Throughout the year there are many topics which will become time sensitive and more relevant. Writing about the plight of battery turkeys during the summer will produce very little feeling from the general public whilst a thought provoking piece at Thanksgiving might start a more public discussion of the problem.
As such at the beginning of the year it is worth researching the calendar and looking at certain periods of the year where your work will strike a stronger chord of resonance with your public. There is nothing worse than seeing a journalist take credit for your idea because they had a better sense of timing. So research the calendar and make sure you are prepared for all the major holidays when people are more susceptible to individual thoughts.
A calendar can be extremely useful in arranging your appointments such as interviews or deadlines. It can make time management a lot easier with less chance of forgetting an important occasion or deadline. When writing away from the mainstream it is relatively easy to be sidetracked and disappear on a tangent when researching your work as often there are many contrasting and unique threads to a story.