Subscriber Sunset

Measure subscriber access sunset timing against a supplied allowance.

Description

A subscriber sunset interval counts whole UTC days between cancellation and the end of access.

A subscriber sunset interval counts whole UTC days between cancellation and the end of access. The caller supplies the maximum allowed continuation interval.^[1]

Measure subscriber access sunset timing against a supplied allowance.

When to use Subscriber Sunset

Use this tool to measure subscriber access sunset timing against a supplied allowance.

Prepare the text, recorded observations, aligned figures or editorial criteria requested. Confirm what each label, count, timestamp or supplied flag represents before interpreting the result.

How to use Subscriber Sunset and understand its results

Prepare the text, recorded observations, aligned figures or editorial criteria requested. Confirm what each label, count, timestamp or supplied flag represents before interpreting the result.
Enter cancellationDate, accessEndDate, allowedSunsetDays using the field table and calculation rules, then run the tool.
Read sunsetDays, daysBeyondAllowance, withinAllowance. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
cancellationDate	Subscription cancellation date	string	Required
accessEndDate	Access end date	string	Required
allowedSunsetDays	Allowed sunset duration (days)	integer; minimum: 0	Required

Enter YYYY-MM-DD strings and a nonnegative integer maximum. Parse UTC midnight, reject invalid parse results and reversed chronology, then return days, excess and inclusive within-limit flag.

days=floor((accessEnd−cancellation)/86,400,000); excess=max(0,days−maximum)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
sunsetDays	Access sunset duration (days)	integer; minimum: 0
daysBeyondAllowance	Days beyond allowance (days)	integer; minimum: 0
withinAllowance	Within supplied allowance	boolean

json

{
  "input": {
    "cancellationDate": "2025-01-01",
    "accessEndDate": "2025-01-31",
    "allowedSunsetDays": 30
  },
  "output": {
    "sunsetDays": 30,
    "daysBeyondAllowance": 0,
    "withinAllowance": true
  }
}

Limitations and assumptions

Native date parsing can normalize some out-of-range calendar dates. No engagement is detected and no subscription is ended.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.

Alternative or Complementary methods

Use Live-Blog Staleness: Measure live-blog update age against a supplied staleness threshold. For a complementary task, use Open-Rate Inflation: Adjust reported email opens for estimated machine-generated opens.

References

Subscriber Sunset — tool.io

Similar or alternative tools

Live-Blog Staleness
Measure live-blog update age against a supplied staleness threshold.
Open-Rate Inflation
Adjust reported email opens for estimated machine-generated opens.