BBC Radio Cymru is BBC Cymru Wales's Welsh-language radio station, broadcasting throughout Wales from studios in Cardiff, Bangor, Aberystwyth and Carmarthen on FM since 1977. At the time of its launch it was the sole FM-only radio service in the United Kingdom. The station broadcasts for up to 19 hours a day (5.00–24.00) and is also available on DAB digital radio and Freeview within Wales and via satellite TV. Radio Cymru has also been streaming its output on the Internet since January 2005. Between midnight and 5.00 (5.30 on Saturdays and Sundays) the Radio Cymru frequencies carry BBC World Service programmes.