Everybody’s Irish on St. Patrick’s Day, particularly on Long Island, where there’s a pot full of parades, Irish music and other festivities big enough to fill an entire weekend.

PARADES

HAMPTON BAYS

WHEN 11 a.m. Saturday, March 18

ROUTE From Hampton Bays Elementary School, west on Montauk Highway to the Hampton Atrium parking lot.

Bagpipe bands, floats, Irish dancers and local youth groups.

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INFO 631-905-6051, aohdivision11.org

BRENTWOOD

1 p.m. Saturday, March 18

ROUTE From Washington Avenue at Clarke Street to Brentwood Road

Local groups and organizations, classic cars, school and bagpipe bands.

INFO 631-273-4443, brentwoodparadecommittee.org

PATCHOGUE

WHEN Noon Sunday, March 19

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ROUTE From Route 112 and East Main Street to corner of West Avenue and West Main

Bagpipe bands, floats, baton twirlers, fire department equipment and local officials.

INFO 631-207-1000, patchoguechamber.com

GLEN COVE

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WHEN 1 p.m. Sunday, March 19

ROUTE From Finley Middle School to St. Patrick’s Roman Catholic Church

Bands, antique cars and military trucks

INFO 516-782-7494, glencoveirish.org

ON STAGE

FRIDAY

ROCK Suffolk Theater’s “Irish Rock Night” is a concert of the music made by iconic Irish bands and artists — U2, Van Morrison and The Pogues. And it falls on St. Patrick’s Day.

INFO 8 p.m. Friday, March 17, 118 E. Main St., Riverhead; $32-$39; 631-727-4343, suffolktheater.com

SATURDAY

CLASSIC The Five Irish Tenors — David Martin, Morgan Crowley, Ciaran Kelly, Alan Leech and George Hutton — fuse wit and lyricism with stories inspired by such beloved Emerald Isle classics as “Danny Boy” and Yeats’ “Down by the Sally Gardens,” plus operatic selections.

INFO 8 p.m. Saturday, Staller Center Recital Hall, Stony Brook University; $42, 631-632-2787, stallercenter.com

SUNDAY

CELTIC CM Performing Arts Center’s annual fundraiser in Oakdale brings live entertainment ranging from a pipe band and chorus to Irish steppers and, this year, the Ireland-based rock band Screaming Orphans. The evening includes a wine, beer and cheese reception, samples of potato soup and Irish soda bread.

INFO 7 p.m. Sunday, March 19, Montauk Hwy., Oakdale; $20, 631-218-2810, cmpac.com