it is a common misconception that you can only let fireworks off on or around Guy Fawkes. You can in fact let fireworks off any time of year and any day of the week including Sundays, but you must let them off before 11pm.
Exceptions to the 11pm rule are:
November 5th (Bonfire Night / Guy Fawkes): You can let fireworks off until midnight.
December 31st (New Year’s Eve): You can let fireworks off until 1am.
Diwali (11th November 2015*): You can let fireworks off until 1am.
Chinese New Year (8th February 2016*): You can let fireworks off until 1am.
*Source: Wikipedia articles Diwali and Chinese New Year.
http://www.firework-review.org.uk/fi...s-regulations/