Automatically create Slack reminders for changed deadlines
When a deadline shifts in a spreadsheet, reminders and context scatter. Notis catches deadline changes in Google Sheets and instantly creates Slack reminders, so your team gets nudged at exactly the right moment.
Trigger
Cell Range Values Changed
Triggers when values in a specified A1 range change in Google Sheets. This trigger monitors a specific cell or range of cells and fires when any values change.
Action
Create a reminder
Creates a slack reminder with specified text and time; time accepts unix timestamps, seconds from now, or natural language (e.g., 'in 15 minutes', 'every thursday at 2pm').
Why this helps
Rescheduled deadlines often go unnoticed, leading to missed follow-ups and last-minute scrambles. Manual reminder creation adds extra steps and cognitive burden.
- Capture rescheduled deadlines automatically without manual intervention
- Ensure no deadline change goes unnoticed by your team
- Reduce the cognitive load of tracking multiple project timelines
- Build accountability by turning changes into proactive reminders
Setup
Build it in a few focused steps.
- 1Connect Google Sheets and Slack to Notis.
- 2Create an automation with this prompt: 'When the deadline cell in my project tracker changes, create a Slack reminder for the new deadline date.'
- 3Select 'Cell Range Values Changed' as the trigger and specify your deadline column.
- 4Choose the Slack channel for reminder notifications.
- 5Test by editing a deadline in your sheet and confirm the Slack reminder is created.
Questions about this workflow
Can the reminder be set for a specific time on the deadline day?
Yes. In your prompt, add: 'Create the reminder for 9 AM on that day.' Notis sets reminders at the time you specify.
What if the deadline cell is cleared or the date is removed?
Notis detects the change and can create a different action (like posting a message). Specify what you want: 'If the deadline is cleared, post a message to the team.'
Can I set reminders for multiple deadline columns?
Create separate automations for each deadline column or date range you're tracking.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Sheets to Slack. A trigger fires from one place; an action lands in another.
Google Sheets triggers
Slack actions
Aggregate Metric Changed
Triggers when an aggregate metric (SUM/COUNT/AVG/MIN/MAX) changes in a Google Sheets spreadsheet. This trigger monitors an aggregate calculation on a target column (optionally filtered by a search column/value) and fires when the calculated result changes.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
Cell Range Values Changed
Triggers when values in a specified A1 range change in Google Sheets. This trigger monitors a specific cell or range of cells and fires when any values change.
Add a custom emoji to a Slack team
Deprecated: adds a custom emoji to a slack workspace given a unique name and an image url. use `add emoji` instead.
Conditional Format Rule Changed
Triggers when conditional formatting rules change in a Google Spreadsheet. Detects when rules are added, updated, or removed. Uses snapshot-based diffing to detect changes between polls.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
Data Validation Rule Changed
Triggers when data validation rules change (added/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Add a remote file
Adds a reference to an external file (e.g., google drive, dropbox) to slack for discovery and sharing, requiring a unique `external id` and an `external url` accessible by slack.
Developer Metadata Changed
Triggers when developer metadata entries change (new/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Add a star to an item
Stars a channel, file, file comment, or a specific message in slack.
Filtered Range Values Changed
Polling trigger that monitors Google Sheets filtered ranges for value changes. Uses snapshot-based diffing to detect when values matching a data filter change. Emits the matched values when changes are detected.
Add call participants
Registers new participants added to a slack call.
New Rows in Google Sheet
Simple polling trigger that monitors Google Sheets for new rows. Detects when new rows are added and returns the complete row data. Perfect for triggering any workflow based on new sheet entries.
Add emoji
Adds a custom emoji to a slack workspace given a unique name and an image url; subject to workspace emoji limits.
New Sheet Added in Google Spreadsheet
Polling trigger that detects when a new sheet is added to a Google Spreadsheet.
Add reaction to message
Adds a specified emoji reaction to an existing message in a slack channel, identified by its timestamp; does not remove or retrieve reactions.
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When this happens · Trigger
Do this · Action
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