The Tumblr One Piece fandom community is very active and has several events going on throughout the year. These range from 1 week prompt weeks focused around specific themes and pairings to large organized collaborative projects. This last April the OPBigBang project was completed as authors are artists posted their work together throughout the month. The below is a short list of upcoming tumblr organized events.
Luffy x Nami Week - June 15th to 23rd 2015 Tag: #luffyxnami week
organized by luffyxnamiweek.tumblr.com
Marco x Ace Week 2 - June 21st to June 27th 2015 Tag: #marcoace week
organized by deer-head-xiris and paigumondus
One Piece Sci-fi/Fantasy Event - Fanfiction & Art Sign Up Deadline: May 31st, 2015
Event Dates: July 24th- July 26th, 2015
organized by opscifiandfanfasy.tumblr.com