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Immigration, Visa & Travel DocumentsGenerated accuracy model review: 2026-05-06
Visa Expiration Countdown Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Days until expiration = expiration date - reference date. Reminder date = expiration date - reminder lead days.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Visa Expiration Date: 2026-09-23
- Reference Date: 2026-09-23
- Reminder Lead Time: 90 days
Expected outputs
- Days Until Expiration: 0 days
- Reminder Date: 2026-06-25
- Planning Status: Inside your reminder window
Known limitations
- This calculator does not decide lawful presence, visa validity for admission, automatic extensions, grace periods, consular rules, status changes, or any official immigration deadline.
Assumptions
- This is a planning estimate only, not legal advice, not an official government eligibility decision, and not an official deadline determination.
- The countdown uses calendar days only.
- The reminder threshold is fully user-entered and can be changed.
- Dates and thresholds are processed locally in your browser and are not stored by Calwarden.
Unit handling
- Visa Expiration Date accepts calendar dates.
- Reference Date accepts calendar dates.
- Reminder Lead Time accepts values in days.
- Days Until Expiration is displayed in days.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current visa-expiration-countdown-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Visa Expiration Countdown Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.