4th April Full Moon (Total Lunar Eclipse – Eastern Asia, Australia, Pacific Ocean, Western Americas. In Britain there will be one on 28th Sept 2015)
13th to 18th April – International Dark Sky Week, join in by reducing light pollution (turn off outside lights where possible) and enjoy dark skies.
22nd/23rd April Lyrids Meteor Shower peak. Moon sets shortly after midnight allowing for a dark sky to view the show, approximately 20 meteors per hour. Produced by debris left behind by comet C/1861 G1 Thatcher.
25th April International Astronomy Day
Sources: http://www.timeanddate.com/eclipse/total-lunar-eclipse.html
http://www.seasky.org/astronomy/astronomy-calendar-current.html