Okay, I'm going to work Jan - December because it's easiest for me.
Jan 1st - leftovers from NYE Late Jan/Early Feb - Chinese New Year (date shifts between about Jan 20th and Feb 20th, you're probably okay if you're not near China Town or somewhere with a high Chinese population) September/October - Diwali (date shifts mid-Sept to late Oct, often mid-week) November 5th - Bonfire Night (also the weekends either side) December 31st - NYE, these are always loud and always bright and last for ages
Plus of course the random incidentals that happen for weddings, birthdays etc.