Fáilte ar ais chuig eagrán nua de Ar An Lá Seo ar an 4ú lá de mí Mheán Fómhair, liomsa Lauren Ní Loingsigh.
I 1971 ghortaíodh dhá dhuine agus trí Gharda nuair a tharla pléasc I mBéal Feirste.
I 1980 tháinig sé amach go mbeadh na líne fón idir Baile Átha Cliath agus an chuid eile den tír níos fearr tar éis an Nollaig.
I 1980 leag páiste a chuaigh chuig Coláiste St Flannan's in Inis nuair a bhí siad ag dul ar ais chuig an scoil agus chuaigh sé chuig Ospidéal Count's agus tháinig biseach iomlán air.
I 2010 tháinig sé amach go raibh plean nua gnó ann de bharr an thobthitim den sceideal ag Aerfort na Sionainne le bliain anuas.
Sin Olly Murs le Please Don't Let Me Go – an t-amhrán is mó ar an lá seo I 2010.
Ag lean ar aghaidh le nuacht cheoil ar an lá seo I 1976 chuaigh The Sex Pistols ar an teilifís don chéad uair nuair a chuaigh siad ar an chlár teilifís So It Goes.
I 2007 chan The Police a chéad dáta sa Bhreatain ar a teacht le chéile nuair a chan siad dhá oíche I Birmingham.
Agus ar deireadh breithlá daoine cáiliúla ar an lá seo rugadh Mark Ronson sa Bhreatain I 1975 agus rugadh amhránaí Beyoncé I Meiriceá ar an lá seo I 1981 agus seo chuid de amhrán.
Beidh mé ar ais libh amárach le heagrán nua de Ar An Lá Seo.
Welcome back to another edition of Ar An Lá Seo on the 4th of September, with me Lauren Ní Loingsigh
1971: at least 2 civillians and 3 police officers were injured when 3 explosions ripped through an area of Belfast.
1980: It was reported that telephone links between Dublin and the rest of the country should improve after Christmas.
1980: A pupil of St. Flannan's College, Ennis was knocked down returning to school and was removed to the Count's Hospital where he was reportedly on the road to recovery.
2010: The dramatic nosedive in Shannon Airport's Flight schedule over the past year prompted calls for the immediate implementation of a new business plan.
That was Olly Murs with Please Don't Let Me Go – the biggest song on this day in 2010
Onto music news on this day In 1976 The Sex Pistols made their television debut when they appeared on the Manchester based Granada TV program 'So It Goes'.
2007 The Police played the first UK date on their Reunion tour when they played two nights at the National Indoor Arena in Birmingham, England.
And finally celebrity birthdays on this day – Mark Ronson was born in the UK in 1975 and singer Beyonce was born in America on this day in 1981 and this is one of her songs.
I'll be back with you tomorrow with another edition of Ar An Lá Seo.
