Conversation so far:
What is the 14th Dalai Lama's plan?
The plan called for Tibet to become a democratic zone of peace without nuclear weapons, and with support for human rights.
When did the 14th Dalai Lama go to D.C.?
In 1987.
Where did the 14th Dalai Lama expand on the plan?
The plan would come to be known as the Strasbourg proposal, because the Dalai Lama expanded on the plan at Strasbourg.

Question: What day did he expand on
Self-contained rewrite: What day did the 14th Dalai Lama expand on the plan?