The patch was due to be released on the week of the 4th of July, but it was delayed several days because of the last minute bugs. Riot ultimately decided to release first the changes to the PVP.net platform only during the server downtime scheduled for Thursday, July 7th early morning. However, the PVP.net changes were delayed further and the server downtime was cut short too. The patch was finally released on Friday, July 8th at 2 PM (PDT). But new content (Leona, first batch of new skins) wasn't available for purchase until Wednesday, July 13.
Updated the filter on summoner name creation and change.
Updated Custom Game Lobby interface.
Added default game names to Custom Game creation.
Custom Games now have a “Quit” button in Champion Select. Players will no longer have to log back into PVP.net to cancel a custom game in Champion Select.
Added multiple rune purchases to the store. Players can now use the “+” and “-“ signs to choose how many runes of a certain type to buy, up to 9.
Updated matchmaking to make level 30s matching with non-30s rarer.
Removed warnings for leaving Battle Training during Champion Select.
Updated Champion filters in the Summoner Profile.
Fixed a bug where the incorrect Mastery Page name was being displayed when viewing another Summoner's profile.
Fixed a bug that could cause you to overwrite your own Mastery Pages.
Fixed a bug with viewing other players’ Rune Pages.
Multiple bug-fixes for the PVP.net store.
Fixed a bug with multiple error pop-ups appearing in PVP.net.
Shield of Daybreak: Leona charges her shield with the power of the sun causing her next melee attack to deal additional damage and briefly stun the target.
Eclipse: Leona raises her shield granting her additional Armor and Magic Resistance for 3 seconds. When the effect ends she deals area of effect damage and increases the duration of the defensive bonuses by 3 seconds if she damages an enemy.
Zenith Blade: Leona throws a blade of sunlight that deals damage to all enemies in a line. Leona teleports to the last enemy champion hit by this attack.
Solar Flare (Ultimate): After a brief delay, Leona calls down a beam of solar energy dealing damage and slowing enemies. Enemies in the center of the beam are stunned instead of slowed.
Sunlight (Innate): Leona's abilities mark the target with sunlight. Allied champions that damage marked targets deal additional damage and consume the mark.
Just after the patch was released, a matchmaking related bug that made Champion Select on matched games appeared, as a result matchmaking was disabled. That same day the servers were brought down to fix the bug and didn't come back until several hours later at 10 PM (PDT). Three hours later a bug that caused Yorick's presence on games to create lag was discovered and he was disabled from Champion Select.