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1948 – Radio Éireann broadcasts on shortwave from Athlone.
1950s[]
1953 – The Athlone transmitter's power is increased to 100 KW.
1960s[]
1960
The Broadcasting Authority Act 1960 establishes a statutory corporation called Radio Éireann. This change comes ahead of the launch of a television service the following year.[2]
1961–1965
No events.
1966
Radio Éireann is renamed as Radio Telefís Éireann.
2 March – RTÉ Cork Local Radio is established[3] as an opt-out service which operated for a limited number of hours per week, relaying the national service (RTÉ Radio 1) at other times. The service was popular but had its hands tied by the limited number of local hours it could output.[4]
RTÉ broadcasts Radio 2 on 1278 kHz in Dublin and in Cork.
1983
No events.
1984
5 November – Breakfast news programme Morning Ireland launches on Radio 1.[6]
6 November – Classical music service RTÉ FM3 commences, sharing its frequency with Raidió na Gaeltachta [7] FM3 broadcast on the RTÉ Raidió na Gaeltachta network at breakfast time, lunchtime and in the evenings.
1985
No events.
1986
August – RTÉ announces that it is to use its allocated longwave frequency for a new pop music station and RTÉ teams up with RTL Group / Radio Luxembourg to form Radio Tara, the trading name of what will becomeAtlantic 252 and the following year,
1987
RTÉ commences building a giant 3-sided 248-metre broadcast mast in Clarkstown, County Meath to broadcast the new long wave station snd sets up studios at Mornington House, in the nearby town of Trim.
1988
RTÉ begins rolling out radical changes to Radio 2's format, which sees the ending on the station of most non-pop music programming and the rebranding of the station as "2FM".
RTÉ operates a temporary station, Millennium 88FM, to mark the year of the Dublin Millennium.
1 September – At 8am, Atlantic 252, in partnership with Radio Luxembourg, launches. The station broadcasts between 6am and 7pm, outside of which listeners were invited to tune to Radio Luxembourg.
RTÉ Cork Local Radio is rebranded as Cork 89FM.[8]
1990s[]
1990
August – Atlantic 252 starts broadcasting in the evening and is now on air from 6am until 2am.
1991
September – Atlantic 252 commences 24-hour transmission.
In late 1998 under the direction of David Dunne, Atlantic 252, in response to dropping audiences, relaunches with a format of indie and dance music which includes 30 hours of 'specialist' music shows.
1999
1 May – RTÉ launches an additional national FM transmitter network and uses it to separate FM3 from Radio na Gaeltachta, and expand its remit to include other types of minority music.[10]
RTÉ FM3 becomes RTÉ Lyric FM and expands its remit to include other types of minority music.[10] The resulting station was Lyric FM (currently styled RTÉ lyric fm). It also moved from Dublin to Limerick as part of a policy of regionalisation.[11]
February – Atlantic 252 is relaunched as "The New Atlantic 252". The format is changed to urban contemporary music (such as garage, house, hip hop and R&B) and the station is rebranded with the slogan "Non-stop Rhythm and Dance".
20 December – Enda Caldwell presents Atlantic 252's final programme ahead of the station going off air. It continues with an automated output for a few more weeks.
2002
2 January – After more than 12 years on air, Atlantic 252 closes.
2003
Radio 2 on 1278 kHz closes.
31 December – RTÉ Radio stops broadcasting on shortwave, concentrating on satellite transmission and relay via the World Radio Network[14]
2004
January – Radio 1 begins broadcasting on long wave from the Clarkstown transmitter which was previously used to broadcast Atlantic 252.
RTÉ closes 2FM on medium wave (612 kHz).
2005
2 May – Songs with English lyrics are played on RTÉ Raidió na Gaeltachta for the first time in a new slot broadcast between 21:00 and 01:00,called Anocht FM (Tonight FM).
24 September – RTÉ announced that broadcasting of RTÉ Radio 1 on 252 kHz would cease on 27 October 2014.[20] Following representations from Irish listeners in the UK and others that date has now been postponed until 2017,[21] later extended until at least June 2019.[22]
2015
No events.
2016
No events.
2017
No events.
2018
No events.
2019
7 November – As part of cost-cutting measures, RTÉ announces plans to close all of its DAB digital radio services, including RTÉ Gold, RTÉjr and RTÉ Radio 1 Extra.[23] The proposals state that the stations will close in April 2020.
2020s[]
2020
No events.
2021
31 March – RTÉ ceases transmission of its radio services on Digital Audio Broadcast (DAB) after a report commissioned by the broadcaster found that just 0.5% of adults in Ireland listen to radio via DAB while 77% of adults in Ireland listen on FM.[24] Its digital stations, which survived a closure plan in 2019,[25] remain on air via Saorview, cable and online streaming,
