Recurring Date Calculator
Find a future recurring date by adding a repeat interval to a starting date.
How to Use the Recurring Date Calculator
This calculator projects a future occurrence by repeatedly adding a chosen number of days, weeks, months or years to a starting date. It can help plan maintenance, billing cycles, reminders, appointments and recurring events.
Example
Starting on January 1 with a recurrence every 2 weeks, occurrence number 3 adds six weeks to the starting date and returns the resulting calendar date.
Factors That Affect the Result
Daily and weekly intervals are straightforward calendar additions. Monthly and yearly intervals can be affected by months with different lengths and leap years, so dates near month-end may move according to JavaScript calendar rules.
Frequently Asked Questions
Can I repeat by months or years?
Yes. Days, weeks, months and years are supported.
What does occurrence number mean?
It determines how many repeat intervals are added to the start date.
Can month-end dates shift?
Yes. Different month lengths can affect calendar additions.
Calendar Rules Behind Recurring Date Calculator
Date differences depend on calendar boundaries rather than assuming every month or year has the same length. Month lengths, leap years and whether start or end dates are included can affect the result. When a legal, payroll or contractual deadline is involved, apply the counting convention required by that specific rule.
Calculation Details and Edge Cases
Recurring dates are generated by repeatedly applying an interval such as days, weeks or months. Monthly recurrence needs special handling for dates like the 29th–31st because not every month contains those days.