Email yourself tomorrow’s calendar agenda

1 · Prepare

Put these pieces in place

• Use the Google account whose main calendar holds the events you want to see.
• Create a standalone Apps Script project at script.google.com, or use any project you already have.
• Keep both functions below in the same project, because the trigger looks up the second one by name.

2 · Review before running

What the script can access and change

3 · Copy

Paste this into the Apps Script editor

Create or open a script file, replace the example values marked above, then save the project.

const SEND_HOUR = 18; // The trigger runs during this hour, in the project time zone. 18 means the 6 PM hour.
const TIME_FORMAT = 'h:mm a'; // This prints times like 9:30 AM. Use HH:mm for a 24 hour clock.
const HANDLER_FUNCTION_NAME = 'emailTomorrowsAgenda'; // The setup function looks for this name so it never installs a second trigger.

function createAgendaTrigger() {
  const alreadyInstalled = ScriptApp.getProjectTriggers().some((trigger) => {
    return trigger.getHandlerFunction() === HANDLER_FUNCTION_NAME;
  });
  if (alreadyInstalled) return;

  ScriptApp.newTrigger(HANDLER_FUNCTION_NAME)
    .timeBased()
    .everyDays(1)
    .atHour(SEND_HOUR)
    .create();
}

function emailTomorrowsAgenda() {
  const tomorrow = new Date();
  tomorrow.setDate(tomorrow.getDate() + 1);

  const events = CalendarApp.getDefaultCalendar().getEventsForDay(tomorrow);
  if (events.length === 0) return;

  const timeZone = Session.getScriptTimeZone();
  const lines = events.map((event) => {
    if (event.isAllDayEvent()) return 'All day: ' + event.getTitle();
    const startText = Utilities.formatDate(event.getStartTime(), timeZone, TIME_FORMAT);
    const endText = Utilities.formatDate(event.getEndTime(), timeZone, TIME_FORMAT);
    return startText + ' to ' + endText + ': ' + event.getTitle();
  });

  const subject = 'Agenda for ' + Utilities.formatDate(tomorrow, timeZone, 'EEEE, MMMM d');
  GmailApp.sendEmail(Session.getEffectiveUser().getEmail(), subject, lines.join('\n'));
}

4 · Run safely

Follow these steps in order

1. Paste both functions and save

   The first function installs the schedule. The second function is the work that runs each evening.

2. Test the agenda by hand

   Choose emailTomorrowsAgenda and press Run. Approve access when Google asks. This sends one email to you and changes nothing on your calendar, so you can repeat it.

3. Install the daily trigger

   Choose createAgendaTrigger and run it once. Running it again is harmless because it stops when a trigger for emailTomorrowsAgenda already exists.

4. Check the schedule

   Open Triggers in the left sidebar. You should see emailTomorrowsAgenda listed as a day timer for the 6 PM to 7 PM hour.

5 · Confirm

How to tell it worked

You receive an email with a subject such as Agenda for Tuesday, March 4, and one line per event, either a time range and title or All day and the title.

If the result is different

Troubleshooting

No email arrives after the manual test.

That is expected when tomorrow has no events on your main calendar. Add a test event for tomorrow and run emailTomorrowsAgenda again.

The times in the email look wrong.

Open Project Settings with the gear icon and check the time zone. Utilities.formatDate uses that time zone, not the one on your computer.

The email arrives at an unexpected hour.

A day timer runs somewhere inside the chosen hour, not exactly on the hour. To move it, delete the trigger in the Triggers panel, change SEND_HOUR, and run createAgendaTrigger again.

The agenda is missing events from a shared calendar.

The script reads only CalendarApp.getDefaultCalendar(). Use CalendarApp.getCalendarById with the ID from Google Calendar settings to read another calendar.