There are usually two EF! gatherings a year, the Winter Moot and the Summer Gathering.
The summer gathering is 5 days of workshops, networking and planning actions at a low impact eco-living camp organised non-hierarchically. It's run without leaders by everyone who comes along, so come prepared to chip in! It happens generally during the school holidays. It often takes place in August.
The Earth First! Winter moot is an opportunity for people who feel affiliation with the ideas behind Earth First! to network, discuss and reflect on the UK ecological direct action movement and to plan for the future. It often takes place at the end of January/beginning of February.