For this chain-of-thought reasoning and answer, what was the question?
The relevant information to answer the above question is: The tree is erected in mid November and lit in a public ceremony in late November or early December.
A: mid November
Q: The Rockefeller Center Christmas Tree is a large Christmas tree placed annually in Rockefeller Center, in Midtown Manhattan. The tree is erected in mid November and lit in a public ceremony in late November or early December. Since 1997, the lighting has been broadcast live, to hundreds of millions, on NBC's Christmas in Rockefeller Center telecast on a Wednesday after Thanksgiving. The tree lighting ceremony is aired at the end of every broadcast, following live entertainment and the tree is lit by the current Mayor of New York City and special guests. An estimated 125 million people visit the attraction each year.

Based on this passage, when do they put up the new york christmas tree?