The BLARNEY maps, which you can earn Blarney Pebble and Celtic Block in, or clothes like Green Bowtie, are created in St. Patrick's week on March 14, 2014 and March 14, 2015, etc. These maps has a lot of Blarney Stone at the end of the parkour. If you kiss there, you will get the stones themselves. However, you can only kiss at each BLARNEY map per 24 hours(1 day). Because of that, @Seth and @Hamumu lowered the max people allowed in the world to reduce lag.