GUIDELINES FOR YOUR EREV SHABBOS PURIM SEUDAH
1) "L'chaT'chilah" the Purim Seudah should start as early in the day as possible after hearing the Megillah reading.
2) As long as you start your Purim Seudah before Chatzos HaYom (12:02 PM), you do NOT have to take a break to Daven Minchah; you can daven Minchah with the Minyan in Shul at 6:00 PM.
3) If you start your meal AFTER Chatzos (12:02 PM) but BEFORE 12:35 PM, then you need to take a break to daven Minchah at 12:35 PM. You are allowed to leave your Seudah to go to daven Minchah and then return. When you return, you should wash your hands, but without a Brachah, and eat some bread.
4) If you will only start your Seudah AFTER 12:35 PM, it is best to daven Minchah with us first at the 12:35 minyan.
5) If you are starting your meal later in the day, it is best not to overeat so that you may have some appetite left for the S'udas
Shabbos.
6) "B'Dieved" you can wash up until the end of the day (Candle Lighting, 5:54 PM).
7) Remember that Shacharis on Shabbos morning begins at 8:20 AM.