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 #Pi (Div. 2) and Codeforces Round #FF (Div. 1) and Codeforces Round #FF (Div. 2) as an example.