Looks like google came up trumps again :-)
MATLOCK BATH ILLUMINATIONS AND VENETIAN NIGHTS
Lights switched-on from Saturday 5 September, 2009 at 7pm and then every night until Saturday 31 October. The parade of Illuminated and decorated boats takes place at 8.00pm every Saturday and Sunday during the season – with a programme of family entertainment in or near the bandstand in Derwent Gardens each evening, commencing at 7.00pm. The Admission Prices to Derwent Gardens are £4.00 Adults (Aged 16 and over), £3.50 Over 60s, Accompanied children under 16 free, Disabled persons free.
Clifftop firework displays 9pm Saturdays 3, 17 and 31 October 2009.