The entertainment ranges from traditional – the Green Man festival to encourage fertility – to the modern, a sampling workshop making electronic music.

At Shibden Hall, Halifax, the May Day celebrations include building a Green Man, an ancient fertility rite.

Valerie Stansfield, museum manager, said: "The Green Man is the spirit of the forest, and the event is about guarding against evil spirits, regeneration and rebirth."

On Monday visitors to the hall will be able to help build a Green Man out of leaves and willow, make masks and listen to traditional folk tales.

At the Trades Club, Hebden Bridge, a free workshop on making electronic music takes place from 11am to 5pm. The Art of Sampling use whatever is to hand to make music – from stamping feet to dripping taps.

At the Piece Hall, Halifax, the Back to the Blitz event takes a trip down memory lane to the sounds of Vera Lynn and Gracie Fields, as performed by Kim LeMar.

There will be military vehicles on display, period artefacts and a recreation of an actual bomb site.

A three-mile walk focusing on the history of Midgley will take place on Saturday. Meet Jacqui at Midgley School car park at 10am.

On Sunday there will be two heritage walks. One takes a look at Luddenden. Meet Liz Watkins at the War Memorial, opposite the Lord Nelson at 2.15pm. The other is a circuit of Lightcliffe, a 3.25-mile moderate walk. Meet David Nortcliffe at the war memorial, Lightcliffe Stray, Lightcliffe. On Monday a wildside walk in Stoodley Pike. Meet Jan and Chris Buckley for a 6.25 mile walk, starting from Hebden Bridge train station at 10.30am.

Bank holiday round up
Supermarkets
Sainsbury's, Halifax, 9am to 7pm, Monday.
Asda, 10am to 4pm, Sunday; 9am to 6pm, Monday.
Morrisons, 8.30am to 7pm, Monday. The petrol station will be open from 8am to 7.30pm.
Marks and Spencer, 10am to 4pm, Sunday and Monday.

Tips
Open as usual all weekend.

Markets
All markets will be closed on Bank Holiday Monday except for the car boot sales at Broad Street, Halifax, and Brighouse, which will run on Sunday and Monday. The open market in Todmorden will be open on Sunday but not Monday.

Chemists
Open as normal on Saturday and Sunday. On Monday, Boots, Market Street, Halifax, 10am-4pm; Ryburn Pharmacy, Elland, 11am-noon; Mixenden Pharmacy, Mixenden Stones Surgery, Mixenden Road, Halifax, 3pm-4pm; Luddenden Foot Pharmacy, Kershaw Drive, Luddenden Foot, 4pm-5pm; Sainsbury's Pharmacy, Wade Street, Halifax, 9am-6pm; Asda Pharmacy, Thrum Hall Lane, Halifax: 9am-6pm.

Rail
Engineering work between Leeds and Shipley, Lancaster and Windermere, Leeds and Mirfield, Manchester Victoria and Salford Crescent, and Huyton and Edge Hill this weekend.

Buses
Normal services tomorrow and Sunday. A Sunday service will run on Monday.