1) Last Friday of the month. Every Friday is a wild card because traders like to clear up their desks before the weekend. Last Friday of the month especially wonky because it's Friday AND close to the end of the month when the brokerage needs to balance its books.
2) Last day of the month. If they didn't meet their quotas or profit targets by the last Friday of the month, this is crunch day. Very easy to pick the wrong pair and give back a big chunk of your profit on this day.
3) NFP Y'all can trade NFP if you like. I prefer to go shopping.
4) FOMC This one is discretionary since it only comes up every 6 weeks. I do not like to get caught in a whipsaw, but if the broker's intentions are crystal clear, then I will weigh in with a small position. I do not need FOMC to make my bank.
5) Wednesday of a NFP week I have made huge gains from Sunday night until midnight Tuesday, and given half of it back on Wednesday, all too often to count this day as a viable trading day. I prefer to hang on to my pips and get other things done.
This is all I have for right now. Your mileage may vary, of course.
LAFF