Groups.io: Changelog

  1. Updates to the Groups.io service

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October 23, 2026

Calendar
  • BUGFIX: When adding or editing an event, the Preview button under Note To Send Attendees did nothing. It now shows a preview.
  • BUGFIX: When adding or editing an event with an end time earlier than its start time, the two were quietly swapped. For example, an event entered as 9pm to 1am on the same day was saved as 1am to 9pm. Instead, you now see an error message, and what you entered is kept so you can correct the end date or time.
  • BUGFIX: On an event's Responses page, the count shown next to Email All Respondents only included the people on the current page of results. It now counts everyone who responded.
  • BUGFIX: On an event's Responses page in grid view, the Actions menu offered Change RSVP and Remove Selected, but grid view has no way to select anyone. Those actions now appear only in list view.
  • BUGFIX: On Your Calendar, the event details window offered an Edit button for canceled events. It no longer does, matching the group calendar.
  • BUGFIX: On Your Calendar, dragging across days highlighted them but did nothing. Dragging no longer highlights days.
  • BUGFIX: A link to Your Calendar that was meant to open at a particular date opened at January 1970 instead. It now opens at that date.
  • BUGFIX: On an event's Responses page, organizers couldn't remove someone who had left the group since responding. Nothing happened when they tried. These responses can now be removed.
  • BUGFIX: When adding a weekly event without checking any days, the page went back to the calendar as if the event had been added, but it wasn't. Now, choosing Weekly checks the day of the week the event starts on. If the event still can't be added, the form stays open with an error message and what you entered.
  • BUGFIX: Events that had ended or been canceled still accepted RSVPs sent by replying to an invitation email or through the API, even though the event page no longer offered the buttons. They no longer do. Replying to an invitation for a repeating event also used to change your response on occurrences that had already happened; it now only changes upcoming ones.
  • BUGFIX: When someone left a group or was removed, their RSVPs to upcoming events stayed behind. They kept holding spots at events with an attendance limit, and if they had RSVPed to every occurrence of a repeating event, they kept being added to new occurrences. These RSVPs are now removed when someone leaves; RSVPs to past events are kept. The spots they free up go to the waitlist the next time anyone RSVPs to the event.
  • BUGFIX: When editing a repeating event, pressing Enter in a field such as the location sent the event's invitation to the group again, as if you had clicked Resend Invitation. Pressing Enter now asks whether to change this event, the following events or all events, the same as clicking Update Event.
  • API NEW: /updategroup accepts a new default_event_color parameter, and the group object includes default_event_color. /addevent and /addrepeatevent use the group's default_event_color when no color is given.
  • API CHANGE: /rsvp now returns the errors "canceled event" and "event ended" for events that are canceled or over.

October 16, 2026

Calendar
  • CHANGE: On View RSVPs, changing the response of the checked attendees cleared the checks. They now stay checked.

October 2, 2026

Calendar
  • BUGFIX: Fastmail users subscribed to a group's calendar feed stopped getting updates, because Fastmail's calendar service was mistakenly treated as an outdated web browser and sent a web page instead of the calendar. Calendar feeds now sync to Fastmail again. The same mistake could also block other apps whose browser identification included punctuation after the version number.

September 25, 2026

Calendar
  • NEW: Adding a calendar event to Google Calendar required downloading an ICS file and importing it by hand. The Add to Calendar button on an event's page is now a menu with two choices: Google Calendar, which opens Google Calendar with the event already filled in so you can review it and save it, and Download ICS file, which works as before. For repeating events, the Google option adds the occurrence you're viewing and the ICS file still contains the entire series. Event notification emails for events that don't repeat now include an Add to Google Calendar link too, and their calendar link is now labeled Download ICS file. Events you add this way are separate copies that don't receive later changes. https://beta.groups.io/g/main/message/41223
  • CHANGE: Event pages now include a Subscribe to group calendar button for members who can subscribe, so you can follow all of a group's events, including later changes, without going back to the calendar page. The subscription dialog on both pages now includes step-by-step instructions for Google Calendar.
  • BUGFIX: When adding or editing a calendar event, typing a time with a space before AM or PM, such as 4:15 PM, saved it as 4:15 AM. Typed times are now read correctly, with or without the space.

September 18, 2026

Calendar

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