We usually go in January and enjoy the parks, just avoid the marathon week. We went the week of the 18th and had 10-15min waits. The only downside was the weather the last 2 years was in the 40's on some days. Mk is usually open till 7pm or 8pm, ak is open til 5pm, mgm about 7pm, and epcot til about 7 and 9pm for the countries.