Due to currently unfavorable wind conditions at altitude above the Guiana Space Center, Arianespace has decided not to initiate the final phase of launch preparation operations.
Subject to favorable weather conditions, the soonest possible launch date for the SSMS PoC Flight is Saturday, June 20 at:
9:51:10 p.m., Washington, D.C. time
10:51:10 p.m., Kourou, French Guiana time
01:51:10, Universal Time (UTC), on June 21
03:51:10 a.m., Paris & Rome time, on June 21
The Vega launch vehicle and its 53 spacecraft payloads are in stable and safe conditions.