The idea is, that wherever you are, at 10 o'clock in the morning you sit down and meditate, preferably doing the metta bhavana. It might be that you only join for 5 min, or you might join for the whole hour. Either way, make sure you include the 5th stage of the metta bhavana, where you send metta out to all the others joining in. Some will be meditating at the same time as you, some will carry on when you get up and some have meditated ahead of you and sent you metta - be sure you remember that in the first stage!
So, please, join in! Whoever you are, wherever you are. There's more details and a chance to add your comments on our Facebook page, and a link to the original map here.
With much metta, the Triratna Sangha in Denmark"