Your dog and cat rather like 'predictable'. Predictable for them means safe.
Fireworks, new people, sounds and smells, travel, loud music and dancing might all be wonderful for us humans, but our four-legged family members mostly like things simple.
So if you're having a party, consider leaving them to go to bed, putting them in their crate or shutting them away somewhere comfy until things quieten down.
And if you're leaving your pets in care for their own holiday, remember they will need to be vaccinated a few weeks before they check in to be fully protected.