THE NUMBERS, EXPLAINED
How to use this calculator.
Generates a fixed calendar-day recurrence, including the first date. This version is not a monthly scheduling rule.
Start with your inputs
Enter first date, interval in days, occurrences. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| First date | 2026-01-01 |
| Interval in days | 7 |
| Occurrences | 4 |
A worked example
With the example inputs above, occurrence dates is 2026-01-01, 2026-01-08, 2026-01-15, 2026-01-22. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Occurrence dates | 2026-01-01, 2026-01-08, 2026-01-15, 2026-01-22 |
How this is calculated
Occurrence dates
repeatDates(a,b,c)
Symbols and units
- a
- First date
- b
- Interval in days
- c
- Occurrences
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
For occurrence i starting at zero, date = starting date + i × interval in calendar days. Include the starting date and stop at the requested occurrence count.
Assumptions and limits
Generates a fixed calendar-day recurrence, including the first date. This version is not a monthly scheduling rule.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Occurrence dates. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Generates a fixed calendar-day recurrence, including the first date. This version is not a monthly scheduling rule.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →