My map from Christmas 2003 has these times, no idea if they have changed, wouldn't have thought they have much, if at all:
Christmas Parade: 4pm
Fantillusion: 7.30pm
Belle's Music Medley: 11.45am, 12.45pm, 1.45pm, 3.45pm and 4.45pm
Mickey's Winter Wonderland: Times vary depending on date you go - 4-5 times a day, similar to Belle's Music Medley - give or take 15-30 minutes.
Tree Lighting Ceremony: 6pm
Sparkling Christmas Fireworks: 8.15pm - not sure if this is still done.
Puppet Show: quarter past the hour from 11.15 to 5.15pm inclusive
Mickey's Christmas: same as puppet show give or take the odd difference here and there
Hope that helps to give a rough guide.