Subscription retry calendar calculator

Calculate attempt dates and last unresolved review date with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use attempt dates and last unresolved review date to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Failure civil date (YYYY-MM-DD)
2026-10-22
Retry day offsets from failure (integer days)
1,3,7
Excluded weekdays; Monday=0 through Sunday=6
5,6
Attempt dates
["2026-10-23","2026-10-26","2026-10-29"]
Last unresolved review date
2026-10-29

Try another scenario

Failure civil date (YYYY-MM-DD)
2026-10-22
Retry day offsets from failure (integer days)
2,5,10
Excluded weekdays; Monday=0 through Sunday=6
5,6
Attempt dates
["2026-10-26","2026-10-27","2026-11-02"]
Last unresolved review date
2026-11-02
Calculation method

Calculation method

Attempt dates

Add each offset; roll forward while weekday is excluded, then deduplicate preserving offset order.

Last unresolved review date

Last planned retry date; this is a review date, not an automatic failure prediction.

Symbols and units
a
Failure civil date (YYYY-MM-DD)
b
Retry day offsets from failure (integer days)
c
Excluded weekdays; Monday=0 through Sunday=6

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Local civil-date retries under explicitly supplied excluded weekdays; no payment-network policy. Supported limits: 1–20 offsets, at most six excluded weekdays.
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