(atis118) wrote:
You're right..I stand corrected, I got mixed up with the fact that
when a tower at a class "D" airport shuts down for the evening, the
airspace reverts to class "E" with controlled airspace starting at
700' or 1200'. I started typing before thinking :-)

When the tower closes, some Class D's revert to a Class E Surface Area,
some revert to Class G. Which one is determined by whether there is
certified weather observing available after the tower closes.