Time Capsule Date Calculator
Time Capsule Planner
Plan your time capsule seal and opening dates
Formula
Opening Date = Seal Date + Wait Years. Days Remaining = Opening Date - Today. Progress = (Days Elapsed / Total Days) x 100.
Frequently Asked Questions
How long should a time capsule stay sealed?
Common durations are 5, 10, 25, or 50 years. Schools often choose 10-25 years. The longest planned capsules, like the Crypt of Civilization, are sealed for thousands of years.
What should I put in a time capsule?
Include items that capture the current moment: newspapers, photos, letters to your future self, popular gadgets, price lists, playlists, and personal mementos. Avoid perishables and batteries.
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