They are celebrating their 25th, and are showing a few special programmes.
From the S4C Press Release:
Special programmes
A two-part documentary, Teledu’r Cymry, (30 October and 6 November) will look at the history of Welsh language broadcasting, from the pioneering days of the 1950s to the establishment of S4C in 1982 and the challenges of the digital multi-channel world.
A season of special editions of S4C favourites will also be broadcast to mark the anniversary:
• Fashion series Cwpwrdd Dillad ( 2 November) looks at the wardrobes of presenters Beti George, Elinor Jones and her daughter Heledd Cynwal and entertainer Dewi Pws – all familiar faces on S4C over the past quarter of a century.
• Homes and interiors show 04 Wal (31 October) visits the set of new Welsh language film, Martha Jac a Sianco, based on Caryl Lewis’ award-winning novel. The programme will also feature the favourite room of S4C Chief Executive, Iona Jones and S4C’s new-look reception and public areas at its Cardiff HQ.
• Twenty-five years of S4C’s iconic countryside series Cefn Gwlad (2 November), presented by Dai Jones, will be celebrated in a special edition.
• Dechrau Canu Dechrau Canmol, S4C’s worship and hymn-singing series, will mark the birthday with a service of thanksgiving on 4 November.
Full details here:
http://www.s4c.co.uk/e_press_level2.shtml?id=134
I saw the 1st episode of Teledu'r Cymry, and was quite an interesting programme, even though it was in Welsh. It even featured clean TWW and HTV Cymru Wales idents (it was a programme about television in wales generally, so wasn't just about S4C).