Eastercon

Eastercon is the common name for the British national science fiction convention. From 1948 until the 1960s, the convention was held over the three-day Whitsun bank holiday at the end of May. Since then it has been held over the four-day Easter holiday weekend. The pre-1960s conventions are generally considered to have been "Eastercons" even though they were not held over Easter.

Read more about Eastercon:  Future Eastercons, Organisation, Two-year Bidding, Eastercon Traditions, Trademark, List of Eastercons