Round #618 is going to be held soon. I suggest making the round's name interesting, i.e. Codeforces Round Phi. Number 618, is the first three digits after the decimal point of number phi=(sqrt(5)-1)/2, which is also known as the 'golden section'. And it will be very memorable. See Codeforces Round 316 (Div. 2) and Codeforces Round 254 (Div. 1) and Codeforces Round 254 (Div. 2) as an example.