How to Create an ICS Calendar File

An .ics file (iCalendar) is the universal standard for sharing calendar events. Defined by RFC 5545, it is a plain-text format that stores event details like title, date, time, location, and description.

Every major calendar application supports .ics files: Google Calendar, Apple Calendar (iCal), Microsoft Outlook, Thunderbird, Yahoo Calendar, and many more. When you send someone an .ics file, they can open it on any platform.

An .ics file is plain text with a specific structure. Here is what a minimal .ics file looks like:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Text2ICS//EN
BEGIN:VEVENT
DTSTART:20260415T140000Z
DTEND:20260415T150000Z
SUMMARY:Team Standup
LOCATION:Room 202
DESCRIPTION:Weekly team sync meeting
END:VEVENT
END:VCALENDAR

Key fields:

• DTSTART / DTEND — Start and end date/time in ISO 8601 format
• SUMMARY — The event title
• LOCATION — Where the event takes place
• DESCRIPTION — Additional event details

A single .ics file can contain multiple VEVENT blocks, allowing you to bundle an entire schedule into one file.

You can create an .ics file with any text editor (Notepad, VS Code, TextEdit):

1. Open a new text file
2. Copy the template structure shown above
3. Replace the event details (SUMMARY, DTSTART, DTEND, etc.) with your own
4. Save the file with a .ics extension
5. Double-click the file to import it into your default calendar app

This method works but is tedious and error-prone — a single formatting mistake can make the file unreadable. Date/time formatting must follow ISO 8601 exactly.

The fastest way to create .ics files is to use Text2ICS:

1. Paste your event details — meeting notes, email text, a schedule, or any text with dates and times
2. Click Extract Events — Text2ICS automatically identifies event titles, dates, times, and locations
3. Download the .ics file — a properly formatted file ready for any calendar app

No need to learn the .ics format or worry about syntax. Text2ICS handles multi-event extraction, timezone detection, and all the formatting details automatically.

Once you have an .ics file, you can import it into any calendar app:

• Google Calendar: Settings > Import & Export > Select file > Import. Full guide
• Apple Calendar: File > Import > Select file, or double-click the .ics file
• Outlook: File > Open & Export > Import/Export > Import an iCalendar file
• Any platform: Double-clicking an .ics file will open the default calendar app on most operating systems