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The core calculator app does not require account cookies or login cookies. DeadlineDays is designed for browser-side calculation without a user account system.

Some calculators may use localStorage for preferences, recent calculator settings, shareable settings, or public holiday API cache data. This browser storage can be cleared from the user's browser settings.

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If personalized advertising is served to users in the EEA, UK, or Switzerland, a Google-certified consent management platform may be required. Last updated: 2026-06-13.