Niantic announced a whole bunch of events on the Ingress Community Forum. In addition to the previously-announced NL-1331X van tour and Second Sunday Mission Days, there’s a 10-day event each month, plus a special “Level 8 weekend” event around August 8 (8/8).
July 23-Aug 2: Field Art Challenge
August 20-30: Meet You Out There Challenge
September 17-27: Optima Kinetic Challenge Part 2
Details for all of these events are on the forum post and summarized on the calendars below.