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Immigration, Visa & Travel DocumentsGenerated accuracy model review: 2026-05-06

Green Card Renewal Date 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

  • Suggested renewal date = card expiration date - renewal window months - extra early-start buffer days.

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Card Expiration Date: 2026-09-23
  • Renewal Window: 6 months
  • Extra Early-Start Buffer: 14 days
  • Reference Date: 2026-09-23

Expected outputs

  • Suggested Renewal Date: 2026-03-09
  • Days Until Suggested Date: -198 days
  • Days Until Expiration: 0 days

Known limitations

  • This calculator does not decide permanent resident status, filing eligibility, replacement needs, receipt-extension rules, biometrics timing, travel risk, or employment verification outcomes.

Assumptions

  • This is a planning estimate only, not legal advice, not an official government eligibility decision, and not an official deadline determination.
  • Renewal window and extra buffer are user-entered assumptions.
  • The calculator does not check current form editions, fees, evidence rules, or agency processing times.
  • Dates and thresholds are processed locally in your browser and are not stored by Calwarden.

Unit handling

  • Card Expiration Date accepts calendar dates.
  • Renewal Window accepts values in months.
  • Extra Early-Start Buffer accepts values in days.
  • Reference Date accepts calendar dates.
  • Days Until Suggested Date is displayed 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 green-card-renewal-date-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for Green Card Renewal Date Calculator.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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