idk\am confused.

On their schedule page
https://www.wgbh.org/schedule?date=2018-06-09&type=radio&channel=89.7+WGBH 
the link for Celtic Soujourn goes to a page dated 11th January,
https://www.wgbh.org/celtic/2018/01/11/a-celtic-soujourn-radio 
but when I click to play it ... the presenter is mentioning events coming up in August \ June 13th.
I don't see any way to skip back\forward ?