# Keep commitments in one calendar

Published by Pawel Jozefiak. [About this project](https://adhd100.jock.pl/about/), [How we check sources](https://adhd100.jock.pl/methodology/)

- Canonical: https://adhd100.jock.pl/one-calendar/
- Language: en
- First published: 2026-09-29
- Evidence checked: 2026-09-29, using AI-assisted source verification
- Clinical review: Not clinically reviewed
- Number 61 of 100 in the list: https://adhd100.jock.pl/#one-calendar

Pick one calendar and check it before you agree to any date.

**The number:** Use a calendar and check it each evening ([East London NHS Foundation Trust, 2026](https://www.elft.nhs.uk/adult-adhd-services/support-available))

## The evidence

- How sure: Certainty of evidence: Not rated. Measured in people with ADHD.
- Evidence grade: C. Grade C: small or mixed studies, expert consensus or clinical practice. Worth knowing, not worth betting on.
- Basis: ADHD clinical guidance and programme content; the isolated strategy has no separately rated efficacy estimate.
- Benefit: 45/100. The benefit score is an editorial prioritization for the general list, weighted by certainty. It is not a prediction of what will happen for you.

## Why it matters

A calendar holds appointments so your working memory doesn't have to. Keeping all dated commitments in one place is taught in adult ADHD CBT, but using a calendar on its own has no established effect on symptoms. The practical aim is a simple system you'll actually reopen.

## How to do it

1. Pick one calendar you can reach whenever you make plans.
2. As soon as you agree to something, add the date, the place or link, and what you need to prepare.
3. Check it before saying yes to anything else, and in your daily review.

## Putting it into practice

### Start now

- 1 minute: Decide which calendar you'll look at before you accept your next appointment.
- 5 minutes: Enter your next commitment with its location and preparation note.
- 15 minutes: Compare next week's calendar with recent appointment messages and correct any gaps.
- 30 minutes: Bring active dated commitments into one calendar view and check for travel or preparation clashes.

### What it looks like

- Put the video appointment link inside its calendar event.
- Add the library return date when you borrow the book.

### Common mistakes

- Keeping two calendars manually can create conflicting dates, so choose one view you trust.
- Vague tasks can bury appointments in a calendar. Keep flexible tasks in your task list.

### A structured start

**Build a trusted calendar**

1. Enter new commitments immediately.
2. Pair a calendar check with an existing daily routine.
3. Review whether missed events need clearer details or better reminders.

### Trusted how-to guides

- [Support Available (Adult ADHD Services)](https://www.elft.nhs.uk/adult-adhd-services/support-available), East London NHS Foundation Trust
- [Autism and ADHD](https://www.bytespcn.nhs.uk/autism-and-adhd/), BYTES Primary Care Network, NHS

## Sources

- [Support Available (Adult ADHD Services)](https://www.elft.nhs.uk/adult-adhd-services/support-available), East London NHS Foundation Trust, 2026 (Tier 1 guideline)
- [Description and Demonstration of CBT for ADHD in Adults](https://pmc.ncbi.nlm.nih.gov/articles/PMC3874265/), Cognitive and Behavioral Practice, 2010 (Tier 2 study)

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General information about ADHD, not a diagnosis or an individual treatment plan. Tailoring changes the order of suggestions; it does not assess you. Medication decisions belong with you and a qualified clinician.

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