When is the final round of the French election? (Spoiler alert, May 7)

Round 2 of the election in France is the final, the decider! Its on Sunday May 7 (did I mention that?)
What we have had today was round 1, and the result from that is that Macron And Le Pen proceed to the final round, Fillon and Melonhead (and any other candidates) are out of the race.