Guild Missions
Guild missions have no set timeframe, however there will usually be shoutouts over the course of the week. At latest there will be several shoutouts on Sunday.
If you would like to participate in guild missions, or even want to do another run for the personal rewards, please message someone with the permission to start those. Espresso, Sling, or Neko will happily start the guild mission for you.
PvE
PvE guild missions are generally run by a variety of players including Neko.
PvP
PvP guild missions are generally run by Neko.
WvW
WvW guild missions are usually rather difficult with a small number of players, however easier missions such as dolyak escorts or camp and tower captures often find players via guild chat. Message any of the people with permission to kick off the mission regardless of whether they participate or not.