Examples
Examples
Try the starting example
- Original local civil billing date (YYYY-MM-DD)
- 2026-01-31
- Future monthly renewals (count)
- 4
- Month convention: anchored-day or month-end
- anchored-day
- Renewal dates
- ["2026-02-28","2026-03-31","2026-04-30","2026-05-31"]
- Renewals with a different day number
- 2
Try another scenario
- Original local civil billing date (YYYY-MM-DD)
- 2026-01-30
- Future monthly renewals (count)
- 4
- Month convention: anchored-day or month-end
- anchored-day
- Renewal dates
- ["2026-02-28","2026-03-30","2026-04-30","2026-05-30"]
- Renewals with a different day number
- 1
Calculation method
Calculation method
Renewal dates
For each future month independently anchor to original day, clipped to its month length; month-end preserves original month-end.
Renewals with a different day number
Count generated dates with day different from original day.
Symbols and units
- a
- Original local civil billing date (YYYY-MM-DD)
- b
- Future monthly renewals (count)
- c
- Month convention: anchored-day or month-end
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
- Civil dates only; no wall-clock timestamps, timezone or daylight-saving arithmetic. Supported limits: 1–120 monthly renewals. Convention must be anchored-day or month-end.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.