What's on today and tomorrow

CORK The Monaco Boys Choir will perform today at 1pm in Triskel Christchurch under conductor Pierre Debat. The programme includes Brahms, Gounod, Saint-Saens, Fauré, Rachmaninov and Britten. Tickets €5. triskelartscentre.ie

DUBLIN

Griswold, a new play by Arnold Thomas Fanning, previews at the New Theatre tonight. The story details the lives of two young Irish men in New York post 9/11 and their need and abuse of each other. Tickets for tonight are €10, €12-15 otherwise. thenewtheatre.com

DERRY

Martin McCrossan takes groups four times a day on walking tours of Derry city and its surroundings. There's no need to book and prices vary depending on distance and whether you want to walk, cycle or take a taxi. derrycitytours.com

MEATH

Every Monday and Thursday night, James Griffin's pub in Trim hosts a free traditional Irish music session in an area of the bar known as Lil's Kitchen. The owner promise a night of jigs, reels and ballads. Starts at 9.30pm. jamesgriffinpub.ie

KERRY

The Killarney races begin today with a family evening and entertainment for all ages. Wednesday sees the visit of the Rose of Tralee, while Thursday is Ladies' Day, when there's a prize for best-dressed lady and most stylish hat. killarneyraces.ie

WATERFORD

A new walking app will be available to download from today, guiding visitors around the Nire Valley in the Comeragh mountains (above). The app costs €1.99 and allows users to download maps and guides as well other information about the local area. Search for Nire Valley Trail Guide in the App store. itsafeeling.com