RRULE Generator — Recurring Calendar String Builder

Date & Time

An RRULE generator turns recurring schedule options into an iCalendar RRULE string.

RRULE Generator

Generates only the RRULE string. VEVENT fields such as DTSTART and SUMMARY are separate.

Frequency

Interval

Count (optional)

Until date (optional)

Weekdays (BYDAY, optional)

RRULE

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What is it

Calendar apps and scheduling APIs express rules such as every Monday, monthly on a date, or repeat 10 times as RRULE strings. Writing them by hand is error-prone, so this tool builds common FREQ, INTERVAL, COUNT, UNTIL, and BYDAY combinations from form inputs.

RRULE:FREQ=frequency;INTERVAL=n;COUNT=count;UNTIL=yyyymmdd;BYDAY=MO,WE

How to use

1Choose frequency and interval.
2Enter count or until date.
3Add weekdays if needed and copy the RRULE string.

Reference

RRULE Generator — Recurring Calendar String Builder Reference
Rule	RRULE
Weekly Mon/Wed 10 times	FREQ=WEEKLY;INTERVAL=1;COUNT=10;BYDAY=MO,WE
Monthly once	FREQ=MONTHLY;INTERVAL=1

Sources & standards

MDN Web Docs: Client-side web APIs - MDN Web Docs
ECMAScript Language Specification - Ecma International

FAQ

Does it generate a full VEVENT?

No. This tool generates only the RRULE line. Event fields such as DTSTART and SUMMARY are separate.

Is input sent to a server?

No. String generation runs only in your browser.