When is the proper time to eat dairy on Shavuos? (night meal, day meal, prior to day meal, Shul Kiddush)
There are many different minhagim when it comes to Milchigs on Shvous. I know the Yekehs have a milchig meal at night. Many people have the Minhag to eat a Milchig meal by day. The chassidim on the other hand, will have some milchigs after kiddush (by day) and then wait half an hour before eating a full fleishig meal. (The logic being that a Seudah's yom tov needs to be with meat).
according to the rema oc 494,3 who first cites this minhag - and according to the machatzis hasehekel there - 7, one needs to have separate breads to be yotzei the korban shni halechem - that means a milchig meal followed by a fleishig meal is proper. r m feinstein - Shu”t Igros Moshe (O.C. vol. 1, 160) wrote that this is the best way to go as well.
see relevant article here