There is also a free non-rotating champion rotation for all summoners below level 6.
Ten champions (10% of champion roster as of patch 7.16) are available for free play at any given time. Usually, each set of champions are available for one week, beginning on Tuesday. However, there are exceptions to this; for example, if Riot Games is releasing a major patch or new content, they will often schedule the new rotation of champions to coincide with the patch release.
Riot also occasionally shifts the rotation date to avoid rotating on US holidays. Because of this, week 9 of Season 1 began on Tuesday, September 7, rather than Monday, September 6 (which was Labor Day in the US). This resulted in a short week, as the next week started on Monday, September 13.
The European (EU) rotation is generally aligned with the United States (US) rotation.
Next week's champion list is usually released on Monday between 5pm-10pm PST.
New champions were occasionally placed into the rotation for the week in which they were released. However, this changed with  and it is generally understood that new champions are held out of the free rotation temporarily out of respect for the players who purchased them early. After that, the new champions were free to play on the second week after they were released., who was released on August 24, 2010, and was not placed into the free rotation until September 7. Riot Games has stated that their policy is to "allow players to preview all champions eventually",
Since the release of, however, new champions have been free to play on the third week following their release.