A SMALL TOOL FOR A REAL PROBLEM

Calendar File Builder

Create an importable calendar event with recurrence and a reminder. Review every occurrence before downloading the ICS file.

Browser processingNo account neededPreview before export

1. Set up your options

Event titleTiming modeStarts (UTC YYYY-MM-DDTHH:mm or date)Ends (UTC) / last included all-day dateRepeatTotal occurrencesReminder minutes before (0 = none)Location (optional)Description (optional)

UTC fields are explicit: no automatic local-time interpretation. Daily/weekly repeats keep UTC time, so local hours may change at daylight saving. For all-day events, enter YYYY-MM-DD and the last day you want included.

2. Review & export

Export preview

Ready. Try the example to see how it works.

Using Calendar File Builder

Create an importable calendar event with recurrence and a reminder. Review every occurrence before downloading the ICS file.

Start with the working example to explore the workflow, or add your own inputs.
Choose the options, build a preview and review the result table and notes.
Copy or download the output. When inputs change, build a fresh preview before exporting.

Example

UTC fields are explicit: no automatic local-time interpretation. Daily/weekly repeats keep UTC time, so local hours may change at daylight saving. For all-day events, enter YYYY-MM-DD and the last day you want included.

Questions & answers

How do I use the ICS download?

Open or import it in a calendar application, then check the title, time and reminder. The website does not connect to your calendar.

Does this send invitations?

No. It creates a file for import and includes no attendees or email delivery.

What timezone are timed events in?

UTC. Calendar applications usually display them in your selected local timezone. Enter the desired UTC time explicitly.

Will weekly repeats stay at the same local hour?

Not necessarily. They stay at the same UTC hour, so a daylight-saving transition can change the displayed local time.

How are all-day end dates handled?

You enter the final included date. The file uses the next date as the exclusive end, as required by iCalendar.

Can repeated imports create duplicates?

Yes. A new build gets a new event identifier. Import the file once and manage later changes in your calendar application.

Is my input uploaded for processing?

Processing runs in a local browser worker with no input upload and no account. Website advertising and analytics are described in the privacy information.