Can You Keep Unused Crackers for Next Year?

Storing crackers for ten to eleven months is a different job from storing them for the two or three weeks between purchase and Diwali night. The container needs to be genuinely airtight rather than just closed, since it's sitting through an entire monsoon and a full summer of heat over that gap. A rigid tin or a thick storage box with a sealed lid, kept in a stable interior room away from outside walls, holds up far better over a year than the same container would need to for a short pre-Diwali wait. Add a few silica gel sachets to the box and swap them out roughly every couple of months rather than leaving the same ones in for the full year, since a sachet stops pulling moisture once it's absorbed its capacity.

Whatever the storage conditions were, every leftover piece needs a physical check before it goes anywhere near a flame next Diwali. This isn't because a year automatically ruins a cracker; it's because a full year is long enough for storage lapses to show up that a shorter wait might hide entirely. Check the fuse for stiffness and colour, check the casing for shape and dryness, and give the box a sniff for any musty smell. A piece that passes all three checks is very likely fine regardless of its age. One that fails any of them goes in the discard pile, no exceptions and no second-guessing based on how carefully it was stored.