I had an argument with a friend about when you can perform the Pesach seder mitzvot of eating a kezayit of shmurah matzah and drinking four glasses of wine (beginning with kiddush).
My friend said that you must wait until after sunset to say kiddush and eat the kezayit of matzah since these mitzvot remind us of the exodus from Mitzrayim. Therefore, these mitzvot must be performed at the time the Jews left Egypt, after sunset following the day of the 14th of Nisan.
I said that this is true, unless you choose to bring yom tov in early (earlier than sunset). I rationalized that, just as with Shabbat, once you bring in yom tov, you can perform kiddush (even if before sunset). And, when you get to the part of the seder to eat Matzah, you can also fulfill this obligation as well.
So the question is, if you choose to bring in yom tov early, do you still have to wait until sunset to start the seder and say kiddush (fulfilling the obligation of drinking the first of the four cups of wine)? Similarly, if you bring in yom tov early, do you nevertheless have to wait until sunset to eat matzah?