Rescheduling a reminder call by chatting with Claude

Plans change. The 8am call that suited you last month now clashes with the school run, or a one-off appointment reminder needs to slide a day later. With ReminderIt connected to Claude, you do not open a settings screen to fix this. You just say what you want.

The tool doing the work: update_reminder

When you ask Claude to change an existing call, it reaches for update_reminder. That single tool can shift the time, rewrite the schedule, or change the wording of the message read aloud, all without deleting and recreating the reminder. Your history and settings stay intact.

Claude usually confirms which reminder you mean before it changes anything. If the wording is ambiguous, it will run list_reminders first and read back the matches so you can point to the right one.

Moving the time of a recurring call

Say you have a weekday medication call at 8am London time and you now want it at 7:30am. Tell Claude: "Move my weekday medication call to 7:30am." Behind the scenes the cron expression changes from 0 8 * * 1-5 to 30 7 * * 1-5, and the reminder keeps everything else.

Because a scheduled call is one-way, ReminderIt simply rings at the new time and reads the message. There is nothing to reconfigure on your phone.

Changing which days it runs

Switching days is just as conversational. "Make my gym reminder Monday, Wednesday and Friday instead of every weekday" turns the cron day field into 1,3,5. You can also go the other way: "Add Saturday to my morning walk call."

If you would rather express it as a spacing, say "every three days" and Claude will use interval_days of 3 in place of a cron expression. Both are valid; pick whichever matches how you think about the rhythm.

Shifting a one-off reminder

One-off calls have a single run_at date and time. To move one, name it and give the new moment: "Shift my dentist reminder from Tuesday morning to Wednesday at 9am." Claude updates run_at to the new ISO timestamp and confirms the result.

This is far safer than deleting and rebuilding, because you cannot accidentally lose the message wording or leave two overlapping reminders behind.

Always confirm the time zone

Times in ReminderIt are anchored to an IANA time zone, so a reschedule is only correct if the zone is correct. When you move a call, it is worth restating the zone: "Move it to 7:30am Europe/London." That removes any doubt about whether 7:30 means your home time or wherever you happen to be.

A quick way to verify the change landed is to ask Claude to run list_upcoming. It will show the next occurrences with their times, so you can see at a glance that the new schedule reads the way you intended.