Hi there Felicia!
I'm so glad that you popped by the Disney Parks Moms Panel with your great question!
Walt Disney World
Park Hours, including Morning and Evening Extra Magic Hours, are usually posted about 6 months in advance. As of today's date, the online Calendar goes as far out as March 21st, 2014.
You can expect the month of April 2014 to be updated some time within the next 3-4 weeks most likely - some time during the month of October most likely. I've included a link above that will take you directly to the Park Hours and Calendar page. I'd recommend that you try checking back on October 1st, or as often as you wish between now and then. Simply click on the little 'calendar' icon next to today's date and the use the arrow buttons to move ahead to April 2014. Once the dates on the calendar have turned from grey to blue, you'll find the corresponding hours and Extra Magic Hours listed below for your trip dates!
If you have additional questions or would like recommendations, please don't hesitate to write me back any time. I'd love to hear from you again Felicia!
Wishing you a simply Magical time planning your visit to Walt Disney World!
Kirsten