This isn't an exhaustive list of all the events that are scheduled before the qualifying window closes - there are other Class 1/Hors Class events in South America and in Asia but looking at historical results, the big names don't tend to compete in them.
So I think the calendar for the main contenders is going to look something like this:
2-Mar Vaucluse Provence: Sarrians, France (Class 1)
3-Mar Vaucluse Provence: Sarrians, France (Class 1)
9-Mar European Cup Round 1: Sarrians, France (Class 1)
10-Mar European Cup Round 2: Sarrians, France (Hors Class)
30-Mar European Cup Round 3: Zolder, Belgium (Class 1)
31-Mar European Cup Round 4: Zolder, Belgium (Hors Class)
4-Apr Olympic Test Event - NB: Not sure if this event will provide ranking points
13-Apr European Cup Round 5: Benatky nad Jizerou, Czechia (Class 1)
13-Apr Continental Championship - Americas
14-Apr European Cup Round 6: Benatky nad Jizerou, Czechia (Hors Class)
27-Apr World Cup Round 5: Oklahoma
28-Apr World Cup Round 6: Oklahoma
12-May World Championship
29-May Continental Championship - Asia
29-May Continental Championship - Europe
4-Jun Final Olympic Ranking