This event “Three-Headed Wurm” has been starting every 2 hours (22h00, 00h00, …) the whole day, but this time, on Vizunah server (FR), the event seems to be stuck and doesn’t start since 00h00 (35 minutes later, still blocked).
On gw2stuff (timer) it is still in the phase “The Vigil is preparing for a mission…”, whereas the 3 Headed Wurm event is now ended on overflown or other FR servers.