Mars Opposition is April 8th.

Approximately once every two years Earth and Mars are relatively close together. The time when the Sun and Mars are directly opposite each other is called opposition. The opposition of Mars will occur on April 8th. On April 14th Earth and Mars will be the closest they will be for this two year cycle.

For these reasons, the month of April will be a particularly good time to observe Mars through a telescope. Normally all you will see is a blurry red disk, but for a few weeks before and a few weeks after opposition, it is possible to see surface detail with a ground based amateur telescope. While Mars can be easily seen with the naked eye at other times, it is brighter and easier to find near opposition.

The article http://earthsky.org/astronomy-essentials/mars-2014-opposition-how-to-see-april-best-time-to-see-brightest has more information.