Prepare one calendar event and verify the time before sharing

SimplyUtils Add to Calendar Link Generator prepares draft shortcuts for Google Calendar, Outlook Web and Yahoo Calendar, plus a downloadable iCalendar file containing one event. Enter a title, date range and optional plain-text location or description. Creating a link or downloading a file does not save anything to your calendar: open the draft or import the file, check its fields and confirm it in the calendar application.

Worked example: a one-hour UTC review

Enter Design review as the title, Room B as the location and Agenda as the description.
Keep Interpret entered times as set to UTC. Use 2026-10-08 for both dates, 09:00 for Start time and 10:00 for End time.
The preview shows 2026-10-08T09:00:00.000Z and 2026-10-08T10:00:00.000Z. These are fixed instants, independent of the device timezone.
Download calendar (.ics). Its event has DTSTART:20261008T090000Z and DTEND:20261008T100000Z.
Import it or open a provider draft. A calendar displaying Asia/Kolkata time should show 14:30 to 15:30 on October 8; check the receiving calendar's timezone setting before saving.

The provider links encode the same start and end instants, but providers can change their draft URL behavior or omit fields. The preview and downloaded bytes are the tool's outputs; they do not prove that every provider version will import each field correctly. Avoid sending a link until you have checked it in the calendar your recipients use.

UTC and Local Device Time have different meanings

UTC interprets the entered clock fields directly as UTC. Local Device Time interprets them in the browser's device timezone and converts the resulting instants to UTC for the links and file. For example, 09:00 to 10:00 on October 8, 2026 with a device configured for Asia/Kolkata becomes 03:30 to 04:30 UTC. The page displays the device timezone so you can check the assumption.

Local times in a daylight-saving gap are rejected rather than moved silently. For a repeated local hour the browser chooses the earlier occurrence. In America/New_York, November 3, 2024 at 01:30 resolves to 05:30 UTC; selecting UTC instead lets you specify the later 06:30 UTC instant explicitly. This is not a selector for arbitrary named timezones. Timed end instants must be later than their starts; equal or reversed values hide the output actions.

All-day dates include the last date you enter

Enable All-day event and enter the first date and Last included date. A one-day event on October 8, 2026 uses October 8 for both inputs, while the exported end is October 9. A range from February 28 through February 29, 2024 exports a start of 20240228 and an exclusive end of 20240301. Dates are advanced as calendar dates, so daylight-saving clock changes do not shorten or shift an all-day event.

The iCalendar specification uses a non-inclusive event end. The tool also escapes text punctuation and line breaks, writes CRLF line endings and folds long lines at 75 UTF8 bytes without splitting a code point. These checks cover this tool's single-event export; they do not certify every feature in the specification or every calendar application's interpretation.

Text limits, sharing and importing

Dates must fall between years 0100 and 9998. Title, location and description support at most 120, 300 and 4,000 UTF16 characters respectively; some emoji count as two or more characters. Unsupported control characters or broken surrogate pairs are rejected. Rich text, attachments, attendees, reminders, recurring events and event subscriptions are not provided.

If any generated provider URL exceeds this tool's 8,000-character cap, the links are hidden and the calendar file remains available. This cap is an application limit, not a promise about browser, email service or provider limits. Shorten descriptions when distributing links. Use a concise location and make URLs in the description easy to recognize; receiving applications decide whether to make them clickable.

Repeated downloads of the unchanged event in this visit use the same event identifier. Editing the event or reloading creates a new identifier. Importing more than once can still create duplicates because calendar apps handle identifiers differently. There is no live update feed, invitation delivery, response tracking or automatic change propagation. If an event changes, tell recipients what changed and ask them to review existing entries before importing another file.

For Google Calendar, use the desktop import instructions to select the .ics file and target calendar. For other apps, use their import or open-file action. Review the result before saving, particularly for early years, all-day ranges and cross-timezone events.

Processing, privacy and troubleshooting

The generator computes links and file bytes in your browser without submitting event fields to a processing API or browser storage. Entries clear on reload. Opening a provider link sends the event details in its URL to that provider; sharing the link or file exposes those details to its recipients and can leave them in browser history. Avoid private meeting credentials or confidential notes. The surrounding site may load analytics and advertising as explained in the Privacy Policy.

If actions disappear, correct the validation message, including both dates and times. If Clipboard access failed appears, select the displayed link text and copy manually, or retry the copy button. If a download cannot be prepared, retry or use a short provider link. If a provider opens an empty draft, copy or import the file instead and review its contents; this tool cannot repair a provider outage or login requirement. Check your device timezone when a local-time preview is unexpected.

For a duration between dates, use Date Calculator. For an on-page time remaining display, use Date Countdown; a downloaded calendar event is a different workflow.