How to Trigger a monday.com Automation X Hours Before a Deadline

Published June 2026 · 5 min read · By Lucas Milanez, Software Engineer

TL;DR: monday.com's native automations can't fire "X hours before" a DateTime. The closest native option ("1 day before") has no time precision. The workaround: create a formula column that subtracts X hours from your deadline, then point Precise Triggers at that column to fire the action at the calculated moment — with 30-second precision.

The problem

You have a deadline in a DateTime column: "June 20, 14:00." You want to notify your team exactly 2 hours before — at 12:00. Or change a status 30 minutes before a client call. Or send a webhook 24 hours before a launch date.

Monday.com's automation center offers "When date arrives" with relative offsets: "on the date", "1 day before", "2 days before." But there's no "X hours before" option. And the "1 day before" trigger fires in the morning batch — not 24 hours before the actual time. If your deadline is at 14:00 on Wednesday, "1 day before" fires at ~7:00 AM on Tuesday (31 hours early, not 24).

For time-sensitive workflows — SLA warnings, meeting prep reminders, production deadlines — this gap is a real blocker.

The solution: calculated alert column + Precise Triggers

The approach has two parts:

  1. Create a column that holds the alert time (deadline minus X hours)
  2. Point Precise Triggers at that column to fire the action at the exact calculated moment

Step 1: Create the "Alert Time" column

You have three options depending on how dynamic you need it to be:

Option A — Formula column (automatic calculation):

Add a formula column with: SUBTRACT_DAYS({Deadline}, 0.0833)

Where 0.0833 = 2 hours expressed as a fraction of a day (2/24). For other offsets:

Option B — Native automation (simple copy):

Create an automation: "When {Deadline} changes, adjust {Alert Time} to {Deadline} minus 2 hours." This uses monday's "push date" feature. Note: this has been reported to produce incorrect results in some configurations — test it.

Option C — Manual column:

Add a separate Date column called "Alert Time" and fill it manually or via import. Simplest, but doesn't auto-update when the deadline changes.

Step 2: Install Precise Triggers

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Step 3: Create a trigger on the Alert Time column

  1. Open your board and add the Precise Triggers board view
  2. Select the Alert Time column (not the Deadline column)
  3. Choose your action: "Notify Person", "Change Status", or "Send Webhook"
  4. Optionally add a condition: "Only run if Status is not Done" (prevents alerting on finished items)
  5. Save. Precise Triggers schedules a job for each item's alert time

When the calculated alert time arrives, the action fires within 30 seconds. If someone changes the deadline, the formula column recalculates, and Precise Triggers detects the change via webhook and reschedules automatically.

Common scenarios

SLA warning 2 hours before expiry

Column setup: SUBTRACT_DAYS({SLA Deadline}, 0.0833). Action: Change status to "At Risk". Condition: "Only if status is still Open."

Team notification 30 minutes before a client call

Column: SUBTRACT_DAYS({Call Time}, 0.0208). Action: Notify the person assigned in the People column.

Webhook to Slack 1 hour before a deployment

Column: SUBTRACT_DAYS({Deploy Time}, 0.0417). Action: Send webhook to your Slack Incoming Webhook URL. The payload includes the item name and scheduled time.

Why not just use "1 day before" natively?

Three reasons:

What about Zapier or Make?

Both can achieve this, but with tradeoffs. Zapier adds 1-15 min of polling delay and costs per task. Make requires a complex multi-module scenario. Neither auto-reschedules when the deadline changes. For a full breakdown, see: monday.com vs Zapier vs Make vs n8n — full comparison.

Related guides

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