29
March
Messier Marathon season
See: http://en.wikipedia.org/wiki/Messier_marathon
8
April
Mars at opposition
Mars is closest to earth for the year, giving the best views in a telescope.
22
April
Lyrid Meteors
See: http://en.wikipedia.org/wiki/Lyrids
17
November
Leonid Meteors
See: http://en.wikipedia.org/wiki/Leonids
1
April
Global Astronomy Month
See: http://universechallenge.org/global-astronomy-month-2013/
13
December
Geminid meteors
See: http://en.wikipedia.org/wiki/Geminids
29
March
Earth Hour
See: http://en.wikipedia.org/wiki/Earth_Hour
22
April
Earth Day
See: http://en.wikipedia.org/wiki/Earth_Day
18
August
Conjunction of Venus and Jupiter
Venus and Jupiter are close to one another. Easily viewable without a telescop from the city.
7
June
Conjunction of the Moon and Mars
Both Mars and the Moon are in the constellation Virgo. Saturn is close by as well. Easily viewed without a telescope, even from the city.