The schedule is:
the 3rd Friday of the Month at 20 - 21 Central European Time on 7290 kHz and the 3rd Saturday of the Month at 10 - 11 Central European Time on 9510 kHz
That is the regular programme of the Month. However, on all other Saturdays there may be a repeat of an older programme.
Thats via IRRS. Then there is also another programme via Hamburger Lokalradio (1 kW CUSB) the 4th Saturday of the Month at 14 - 15 Central European Time on 6190 kHz. No repeats.
Please note the operators have fixed times in Central European Time. Thus GMT times will change during "summer".