Ok, I'll give you my (mainly) Scottish list for the year. (And I'm not booked to play, I just go for the enjoyment).

Edinburgh - tomorrow and Saturday - Northern Streams. Music from Scandinavia and Scotland.
Next weekend - Girvan Folk Festival
May 15 - 17 Fifesing Traditional Singing Weekend
June 26 - 28 - Falkland Traditional Music Festival
July 9 - 12 - Stonehaven Folk Festival
July 26 - 28 - Cullerlie Traditional Singing Weekend
July 31 - August 7 - Sidmouth Folk Week
Aug 21 - 23 - Innerleithen Music Festival dovetailing into
Aug 24 - 28 - Whitby Folk Festival ( a first for me)
Sept 9 - 13 - Linlithgow Folk Festival
Nov 6 - 8 - Button Boxes and Moothies weekend in Aberdeen

Plenty others up here that I've missed plus some one-day events and concerts, including Edinburgh Festival Fringe which has a lot of folk events. And I'll be playing a few ceilidhs as well.