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NBA action all year round?! Possible! ...if you know the calendar.
Here it is...
SEPTEMBER: Training Camp
This is when players report back to their teams and start practice.
OCTOBER: NBA Pre-season
If the NBA was a play, then the pre-season is the rehearsal.
NOVEMBER: NBA season starts
It's game time!
DECEMBER: Christmas Games
The best teams, the best players, and the best match-ups usually play on Christmas Day.
JANUARY: All-Star Nominees
Expect a lot of highlight plays in this month because players are starting to market themselves in order to make the All-Star Game.
Quick Note: To be an all-star player, you'll have to get "voted-in" by the fans. More highlights equals more votes.
FEBRUARY: Trade deadline; All-Star Game
Blockbuster trades usually happen in this month.
You can also look forward to the following: Rookie Game, Three-Point Contest; Dunk Contest; and All-Star Game. 
image taken from: NBA.com
MARCH and APRIL: March Madness, Jordan Brand Classic, and McDonald's All-American Games
March Madness is the college version of the NBA playoffs.
High School all stars can be seen playing in the Jordan Classic and McDonald's All-American games.
Why are these events important? Because they're the future NBA stars.
image taken from: mcdonaldsallamerican.com
MAY : NBA Playoffs
The real NBA season! This is where the championship begins. Clear your schedule. Every game counts here...
JUNE: NBA Finals and NBA Draft.
A new champion is crowned in this month.
You will also get to see which teams the rookies will play for in the NBA draft.
JULY: 'Free Agent' period.
Big name players can now sign new contracts with their old teams, new teams, or just retire...
AUGUST: International Competition
During the offseason, International NBA players usually compete for their countries in international tournaments like the Olympics, EuroBasket, and the Asian Championship games.